fix(pages): harden deployment input shell boundary - #2272
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The central Semgrep gate reports three blocking WARNING findings on this repository's own main, so it fails on every pull request regardless of contents, including the ones adding the reusable workflows. Reproduced locally with the ruleset the workflow pins (semgrep --config=p/default --severity=WARNING --severity=ERROR), which returns the same three. deploy-pages.yml interpolated inputs.project_name, inputs.build_dir and inputs.custom_domain directly into a run: block, so a caller-supplied project name containing shell metacharacters would have executed. They now reach the script through env. This is the same defect class the description-boundary workflow carried in its first revision, caught by the same rule. codeql_ghas_configuration_identity.py and strix_evidence_binding.py each open a URL taken as a plain string parameter, with no check on scheme or host. Every caller builds a https://api.github.com/... URL, but the functions did not enforce it, so an unexpected caller could have made either fetch any scheme or host including file:// or an internal address. Both now pin the origin through _require_github_api_url before the Request is built, and raise their own error type otherwise. The two urllib call sites keep a scoped # nosemgrep, in that order and not the reverse: the audit rule fires on any non-literal URL and cannot see the validation, so the hardening is the justification for the suppression rather than a substitute for it. Both are per-rule and per-line, and the central workflow counts suppressed findings separately from blocking ones. Local run after the change: 0 blocking findings. Existing tests for both scripts: 56 passed. A new test pins that the opener rejects http://, a lookalike host, and file://. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YHVBDaZS5NZT9aQcbRg9Av
📝 WalkthroughWalkthrough워크플로 입력값을 환경 변수로 전달하도록 변경했습니다. GitHub API 요청은 Changes입력 및 URL 보안 경계 변경
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix Merge Risk: 🔵 Low · up to A GitHub API redirect could expose an authentication token to another origin. The risk is bounded and theoretical, but redirect handling should be constrained. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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In `@scripts/ci/codeql_ghas_configuration_identity.py`:
- Line 161: Update the URL-fetching flow around the producer returning url so
redirects are constrained to GitHub API origins and never forward Authorization
Bearer headers to external Locations. Use the existing _require_github_api_url
validation for each redirect target or apply a NoRedirectHandler, and add a
regression test covering an external redirect without token leakage.
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📒 Files selected for processing (4)
.github/workflows/deploy-pages.ymlscripts/ci/codeql_ghas_configuration_identity.pyscripts/ci/strix_evidence_binding.pytests/test_strix_evidence_binding.py
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Current-head review found two evidence gaps before this can be treated as the complete successor for the central SAST repair.
deploy-pages.ymlis the genuinely exploitable shell-injection fix, but this PR itself documents thatsast-semgrep.ymlexcludes.github/workflows. Therefore a hosted Semgrep GREEN cannot verify this change. The PR changes no workflow-security regression test/fixture. Please add a contract test that fails if caller-controlledinputs.project_name,inputs.build_dir, orinputs.custom_domainis interpolated directly into arun:body again, and that pins the env-mediated boundary.- The CodeQL identity helper is hardened here, but the only new regression file in this PR is
tests/test_strix_evidence_binding.py. Sibling #2269 carriestests/test_codeql_ghas_configuration_identity.py::test_request_json_rejects_non_github_https_urls, so #2272 has not yet completely inherited that valid test delta. Keep #2269 open (or explicitly carry its focused regression into this branch) until the production fix + test evidence are complete.
This is not a request to weaken or bypass the current queued gates. #2272 and #2269 are siblings from the same protected-main base, not an ancestry successor, so close/supersede only after the valid delta is demonstrably inherited.
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Converted back to Draft because the current exact head Deterministic RED: Python's default Minimum causal repair: for both authenticated GitHub API helpers, either fail closed on redirects or validate every redirect target before any redirected request is emitted and prove the bearer header cannot cross the admitted origin. Add focused cross-origin 30x RED/GREEN coverage compatible with the supported Python matrix. The two earlier evidence gaps on this unchanged head also remain: |
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Exact-head evidence on The protected workflow invokes Separately, the authenticated urllib helpers still need redirect credential containment: initial |
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Separate exact-head RCA on current |
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Owner path recorded as #2277 ( |
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Clearing the Semgrep rule on these two call sites left Bandit's B310 firing on them, so `main` would still have been red after this PR merged and every PR here would still have inherited a failing required check -- just a different one. The failure on #2261 is exactly this: two B310 hits, no Semgrep hits. B310 is an AST check for `urlopen` with an unproven scheme. It cannot see `_require_github_api_url`, which is what actually answers it, so the suppression goes inline on the call line while the justification and the Semgrep suppression stay on the lines above. The hardening is still the reason both are allowed; neither replaces it. `bandit -ll` on both files: no issues identified, 2 suppressed. `semgrep --config=p/default --severity=WARNING --severity=ERROR` on scripts/ci/: 0 findings. 57 tests pass. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YHVBDaZS5NZT9aQcbRg9Av
The same `_require_github_api_url` guard landed in both scripts, but only strix_evidence_binding had a test for it. A guard that exists in two places and is checked in one is the half that silently rots. The mirrored case pins all three rejections that matter: the wrong scheme, the lookalike host `api.github.com.evil.example` that a prefix check would wave through, and `file:///etc/passwd`. 58 tests pass across both files. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YHVBDaZS5NZT9aQcbRg9Av
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I force-pushed over this branch by mistake and then restored it. Recording exactly what happened, because the PR description says no force-push and I did one anyway. What I broke. I had a stale checkout at What I restored. Both commits are back, in their original order and unmodified:
What I added, and why it is not optional. Clearing the Semgrep rule on the two I also mirrored the origin-pin test into What I did not touch. The redirect-containment question and the #2269 inheritance order are yours. I did not merge, approve, undraft, close a sibling, or alter the path policy. If you would rather carry the Bandit fix yourself on a head you control, say so and I will revert my two commits off this branch. |
Record the transient forced-update loss, restored Pages ancestry, canonical owner merge, exact validation boundary, and remaining Proposed gates. Signed-off-by: OpenAI Codex <noreply@openai.com>
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Exact-head repair review of 5896e6052921acf00f7c882fbfd53871d42bbf60 (tree a4df0698acd4b5265f9d6a834dc0a40cb5fcb09d; COMMENT, not approval).
This generation closes both circular successor gaps without copying an alternate owner implementation. Current first-parent e0b6e70f... already preserves the previously lost Pages evidence through ancestry (bb9413a4... → 4967d66f...), including the dedicated exact-head workflow and dependency-free shell-boundary regression. Ordinary merge 3923b196... stacks canonical GitHub API authority owner #2279@9c19c6e... as its second parent, retaining the stricter exact-authority parser, no-redirect production openers, actual-opener synthetic-302 matrix, Strix transport seam repairs, doctoring, and product Gap evidence. No Force Push was used for this repair; the ref update from e0b6e70f... was fast-forward-only.
Exact-tree evidence: Pages + GitHub authority/client focused suites 91 passed normally and with GITHUB_ACTIONS=true; full suite 3370 passed, 28 skipped, 40 subtests; touched production modules 509 statements / 172 branches at 100%; interrogate, compileall, and git diff --check pass. The former redirect-authority thread was answered on this exact head and resolved; unresolved inline threads are now 0.
PR remains Draft/Proposed and mergeable. Fresh exact-head runs are queued: Deploy Pages Input Security CI 35435779611, Python Security 35435779589, Security Scan 35435779632, SAST Semgrep 35435779583, CodeQL PR 35435779630, and Agent Review Runtime Quality CI 35435779619. No current-head independent approval or hosted GREEN exists; no merge, bypass, synthetic status, manual rerun, or predecessor-receipt transfer is authorized.
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Exact-head current-owner repair review for cd3b41b8989e096d1ee375d332347c8bb819acf9 (COMMENT, not approval).
The prerequisite-currentness finding in review 5255546995 was valid. Previous head 5c71e889… carried #2279 only through b338d1e…; current owner d1e4380… additionally contains the RED 64f33a8c… and GREEN d1e4380… that qualify the foreign Semgrep evidence owner.
This repair uses an ordinary two-parent merge whose first parent is the complete previous #2272 head and whose second parent is current #2279. The merge delta is exactly the two missing owner files:
docs/doctoring/github-api-url-authority-2248.mdtests/test_github_api_url_boundary.py
The PR is retargeted to fix/github-api-url-boundary; its effective stack delta remains the Pages/SAST successor work, and no owner source was copied or forked.
Exact tree b03978a039292a525d0c8fec55b8ab7d6b622ba1 verification:
- Pages + CodeQL/Strix/GitHub-authority focused suite: 94 passed
- same suite with
GITHUB_ACTIONS=true: 94 passed - full
GITHUB_ACTIONS=truewarnings-as-errors suite: 3373 passed, 28 skipped, 40 subtests - compileall and diff check: PASS
- protected
maincomparison at verification: 41 ahead / 0 behind - unresolved review threads before publication: 0
Fresh exact-head hosted runs and a qualifying independent approval remain mandatory. This is evidence only, not approval or merge authority.
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Exact-head RCA follow-up (2026-09-20 KST): prior Agent Review Runtime Quality run 35445211402 / job 105902856459 failed with 527 cascading Strix fixture assertions. The first causal error was Ordinary RED→GREEN repair:
Focused evidence: |
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Exact-current-head RCA repair — The predecessor repair was invalid:
Ordinary, non-force RED→GREEN repair:
Fresh local evidence on the corrected tree: binder + closure suites 37 passed, both Python test modules compile, shell syntax passes, and Fresh hosted runs are nonterminal: Runtime Quality |
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Naruon consumer fresh sweep found a new canonical-owner overlap that changes this lane's acceptance graph.
#2272 exact No predecessor hosted receipts transfer across that reconciliation. Reacquire exact-head Runtime Quality/security/CodeQL/SAST evidence and independent review after the owner graph converges. No force push, whole-file ours/theirs, duplicate Strix runtime writer, or gate weakening. |
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Exact-head stack repair —
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P1 — the dedicated Pages acceptance workflow cannot admit this PR on its current stacked base.
.github/workflows/deploy-pages-input-security-ci.yml declares pull_request.branches: [main], but this PR now targets codex/strix-trusted-binder-root@00082e8dc7ab6bdd3261c4f7131f6e300a66b645. GitHub evaluates that filter against the pull request base branch. Therefore a new synchronize/reopen while this stack is valid cannot schedule Deploy Pages Input Security CI.
The same-SHA queued run 35475555530 is not sufficient provenance: retargeting preserves the head SHA, and commit-associated run listing does not prove that the run was admitted against the current base. The PR body explicitly requires fresh exact-head Pages Input Security on the stacked base, so the trigger and acceptance contract currently disagree.
Please make this read-only pull_request workflow admit supported stacked bases without hard-coding a mutable parent branch (the existing path filter and exact-head checkout still bound scope), add a trigger/static regression covering a non-main stacked base, and obtain a fresh run after that source change. Keep predecessor/base-stale run receipts non-authoritative.
RED proves the Pages acceptance workflow excludes feature-base PRs through branches: [main]. Remove only that pull_request base filter and pin the trigger boundary; path scope, exact-head checkout, read-only permission, concurrency, and shell test remain unchanged.
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Exact-head repair evidence for #2272 Topology:
P1 RED → GREEN:
The repaired trigger immediately admitted current-base Pages run 35479111013. Security 35479110987, Semgrep 35479110975, and CodeQL 35479111005 are also queued/nonterminal. This repairs the reviewed source defect but is not approval or merge authority. Draft / Proposed remains; no stale check transfer, self-approval, manual rerun, bypass, Force Push, or merge was used. |
RED proves the reusable Pages workflow validates only direct run-script interpolation while caller-controlled project_name and build_dir still reach Wrangler's string-valued command input without a fail-closed syntax boundary.
Validate project identifiers, repository-relative build paths, and DNS-shaped custom domains before the credentialed Wrangler action starts. The executable regression rejects shell metacharacters, option-shaped names, traversal, absolute paths, malformed domains, and multiline values.
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Exact-head repair review for f5b96a4cb8add16208a3c8dbacd99d94b65b4bcb (tree 63124fe5ab711b6bb3c5d54042cc5d4c0c49e517; COMMENT, not approval).
The prior boundary stopped direct run: interpolation but left project_name and build_dir inside Wrangler's string-valued command input without pre-action validation. RED 75c5deb843911d0981a56f865a2289024041cc39 fails because the validator is absent. GREEN adds a credential-before-use guard for bounded project identifiers, relative non-traversing build paths, and DNS-shaped domains; the executable matrix rejects metacharacters, option-shaped names, absolute/parent paths, malformed domains, and multiline values.
Exact-tree verification: focused 63 passed normally and 63 passed with GITHUB_ACTIONS=true; full warnings-as-errors suite 3,398 passed / 5 skipped / 40 subtests; compileall and diff check pass. The remote ref moved only by ordinary fast-forward from 6ac3d96d…, and the remote tree equals the verified local tree.
Fresh current-head Pages, Security, Semgrep, and CodeQL runs are queued. Runtime Quality, Python Security, and qualifying independent approval are absent; transport success is not approval. Draft/Proposed remains correct, and no merge or gate bypass is authorized.
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P1 — rejected Pages inputs are still published after the validator fails.
At exact head f5b96a4cb8add16208a3c8dbacd99d94b65b4bcb, Validate deployment inputs exits non-zero without echoing the hostile value, but the later Summary step uses if: always() and appends the raw PROJECT_NAME, BUILD_DIR, and CUSTOM_DOMAIN to $GITHUB_STEP_SUMMARY. A rejected multiline/backtick/Markdown payload therefore remains operator-visible and can forge the deployment summary even though Wrangler is skipped. This contradicts the PR's fail-closed/no-hostile-value claim.
The new executable test only checks the validator subprocess return code; it never exercises the post-failure summary path. Please gate summary publication on a successful validation output (while preserving summaries after later deploy failures), or publish only fixed redacted placeholders when validation did not succeed. Add a production-shaped fixture with a unique multiline/Markdown marker that proves the marker is absent from stdout/stderr and the job summary after rejection. Keep the current pre-Wrangler validation and stacked-base trigger repair unchanged.
The four exact-head runs 35479695947, 35479695969, 35479696006, and 35479695910 are queued, so they are not acceptance evidence. Draft/Proposed remains correct; no merge, auto-merge, bypass, or rerun is authorized.
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Current authority — 2026-09-20 KST
f5b96a4cb8add16208a3c8dbacd99d94b65b4bcb; exact tree:63124fe5ab711b6bb3c5d54042cc5d4c0c49e517.codex/strix-trusted-binder-root@782d67b433aa71cf2c81b2a81f55ae192a317f3b.Canonical-owner convergence — parent P1 is inherited, not solved here
The earlier #2272 repair copied
strix_evidence_binding.pyinto consumer fixture workspaces and added a count-only contract. The stack correctly removed that duplicate child ownership and now leaves Strix runtime/binder authority in #2291.However, fresh exact-tree inspection shows that the inherited #2291 harness blob is still
53465a01cc82fa2a71f93ddc848285cb94c0bd73, and specialized fixture paths in that inherited blob still callmaterialize_trusted_gate_fixture "$repo_root_dir/scripts/ci"and execute the gate from the consumer root. Therefore the previous statement that this stack already has gate/model/binder materialized only under a siblingtrusted-source/scripts/ci, with the consumer binder absent across the specialized matrix, was too broad.Canonical #2291 now records the current valid P1 and exact repair scope: 24 concrete specialized consumer-root materializations must be repaired in #2291 (or individually proven outside the production boundary), using a non-consumer trusted runtime root, absolute trusted-gate execution, explicit
STRIX_REPO_ROOT="$repo_root_dir", and a binder-free consumer root. #2272 must inherit that owner repair by ordinary/non-force parent reconciliation after #2291 is accepted; it must not reintroduce a parallel Strix writer.The #2272 child delta remains the Pages/SAST lane. No child receipt is treated as proof that the parent Strix P1 is closed.
Pages boundary repair
The previous exact head
6ac3d96d…correctly admitted stacked PR bases, but its regression inspected only directrun:scripts. Caller-controlledbuild_dirandproject_namestill reached the credentialedcloudflare/wrangler-actionthrough its string-valuedcommandinput without a fail-closed syntax boundary.75c5deb8proves the missing validator and exercises safe/hostile values.f5b96a4cvalidates bounded Pages project identifiers, repository-relative build paths without parent traversal, and DNS-shaped custom domains before the Wrangler action starts.docs/product-technical-gap-baseline.mdrecord the Pages owner/Gap/action/evidence boundary.Exact-tree evidence
Retained child/local evidence is affected Pages + stacked-security + GitHub API + Strix contracts 63 passed, the same focused suite with
GITHUB_ACTIONS=true63 passed, full warnings-as-errors 3,398 passed / 5 skipped / 40 subtests passed, plus compileall andgit diff --checkPASS. These results predate the newly accepted #2291 24-call-site repair contract and therefore do not close or override the inherited parent P1.Current-head Deploy Pages Input Security, Security Scan, SAST Semgrep, and CodeQL generations require fresh terminal acceptance; Runtime Quality/Python Security absence or predecessor receipts cannot be promoted to acceptance. CodeRabbit/Devin transport success is not an independent
APPROVEDreview.Required order for this stack is #2291 complete causal repair → exact-head GREEN/review/hosted acceptance → ordinary protected-main integration → #2272 ordinary/non-force parent reconciliation while preserving its seven Pages/SAST child paths → fresh #2272 exact-head acceptance. No self-approval, blind rerun, synthetic status, scanner suppression, gate weakening, bypass, Force Push, destructive rebase, duplicate Strix owner, or PR Close is authorized.