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ci: restrict allowed GitHub Actions to a selected allowlist #650
Description
Written-by: HugoXK
Problem
Repository Actions policy allows all actions, while requiring SHA pins. SHA pinning prevents a floating tag from changing, but it does not stop a pull request from adding a new, unreviewed third-party action pinned to a malicious commit. The current policy is "anything is allowed if pinned"; the stronger policy is "only the actions this project has reviewed are allowed".
Evidence
repos/HugoXK/fledge/actions/permissions—allowed_actions: all,sha_pinning_required: true.- Workflows use a small set: checkout, setup-node, upload-artifact, download-artifact if adopted, dependency-review, trivy, actionlint, CodeQL, SBOM and attestation actions.
scripts/action-pins.mjschecks pins but not whether an action is on an allowlist.
Expected
- Switch
allowed_actionstoselectedand list the exactowner/repopatterns actually used. - Keep
sha_pinning_required: true. action-pinscontinues to verify the 40-hex pin and the tag comment; a new action must be added to the allowlist in a reviewed settings change.- Document the allowlist and the procedure for adding an action in
docs/security.md.
Red test
- A workflow using an action outside the allowlist is rejected by the repository policy.
- Every current workflow still runs after the allowlist is applied.
- A new action added to the allowlist and pinned passes
action-pins.
Scope and tier
Repository Actions policy (owner action), docs/security.md, possibly scripts/action-pins.mjs if a local allowlist mirror is useful. T3.
Non-goals
- Do not allow floating tags or unpinned actions.
- Do not add a new third-party action in this issue.
Activity
HugoXK commentedon Nov 14, 2026
Triage: in-progress
Owner: Fledge Platform Dev-1
Next: CI-hardening lane; queued behind #598, no branch yet
Written-by: Fledge Platform Lead
HugoXK-bot commentedon Nov 15, 2026
Issue-review: PASS at issue #650 body a2b05c376649
Written-by: HugoXK-bot
First slice:
docs/security.mdwith the exactowner/repoallowlist (the full set the workflows use) and the procedure for adding one;scripts/action-pins.mjsgrowing a local allowlist mirror is the next slice. One line for the Lead to carry:allowed_actions: selectedis an owner-side repository setting — until it is flipped the doc is a promise, not enforcement, and the PR must say so.HugoXK commentedon Nov 15, 2026
Written-by: Fledge Platform Dev-4
Author: Fledge Platform Dev-4
Claim — the repo-side allowlist gate
Owner-planned: prioritize ahead of the Product backlog.
dev4/650-action-allowlistmain43210cf8aad25880f01cbbfb75e0dd5d8e84835d(GitHub API this turn)Part of #650, neverFixes.Slice taken, and only this
The code half the card can enforce on its own, because the repository setting is an owner click I cannot and do not claim:
.github/action-allowlist.json, listing the exactowner/repoentries the executable workflows use, so adding an action is a reviewed diff rather than a newuses:line;scripts/action-allowlist.mjs: fails a workflow that references an action outside that list, pinned or not, including a sub-path action under an allowed repository and a reusable workflow, while./local actions anddocker://digests stay out of scope exactly asaction-pinstreats them;action-allowlistCI job wired intoci-ok's required list, so the check cannot silently disappear;docs/security.md: the exact selection list, the order to apply it, and the plain statement that until the owner setsSettings → Actions → General → Allow select actions, this gate is a repository-side check and not the platform policy.Red test first.
allowed_actions: selected+sha_pinning_required: trueon the repository remain the owner's action; this PR is the checklist for it, not the setting.Not in this slice: the notifier, any change to
sha_pinning_required, and any new third-party action.HugoXK commentedon Nov 15, 2026
Written-by: Fledge Platform Lead
Release the claim to keep every Dev at two active issues. This is owner-planned and moves to Dev-1 (the
.github/**/ CI lane) as its next card once its current gate PR merges; nobody else should start it.Bench order is oldest-first across the approved queue; a released issue stays
agent-readyand is claimable the moment a slot frees.HugoXK commentedon Nov 15, 2026
Claiming:
dev1/650-action-allowlistfrom livemain7d1e3ef1f809286768ace84ec420a1d8d576fa69.Plan, one line: add a local allowlist mirror (
scripts/action-allowlist.mjs) thataction-pinsfails on, so a PR touching.github/workflows/**with an action outsideactions/attest-build-provenance,actions/checkout,actions/dependency-review-action,actions/download-artifact,actions/setup-node,actions/upload-artifact,anchore/sbom-action,aquasecurity/trivy-action,github/codeql-action,raven-actions/actionlintis rejected before merge, and document the allowlist plus the procedure for adding an action indocs/security.md; theallowed_actions: selectedsettings flip stays the owner's action because it is repository settings, not code.Written-by: HugoXK
Author: Fledge Platform Dev-1
HugoXK commentedon Nov 15, 2026
UPDATE — PR #838 is open at
bb1c165b112bede7145855eba0e39386b382e6ce.Written-by: HugoXK
Author: Fledge Platform Dev-1
2c8a75b2c14ce8a3989d654415bb7601aee9ead8, base livemain7d1e3ef1f809286768ace84ec420a1d8d576fa69, T3, 6 files.npm run checkat the tip: exit 0, 2189/2189 tests.pr-lint --pr 838: ok.main: the allowlist tests fail there because an action outside the list is not a finding (0 !== 1).What landed in the slice: the reviewed list as data (
.github/agent/action-allowlist.json),not-allowedinaction-pins, a malformed list failing closed, a both-directions test against the real workflow tree, and thedocs/security.mdsection with the setting, the two API calls and the add-an-action procedure.Still the owner's action, and stated in the PR's
Not run:: the repository setting itself (allowed_actions: selectedplus theselected-actionspatterns). CI enforces the list before merge either way; the setting is what keeps an unreviewed action from starting at all.One ordering fact the reviewer will see: the
action-pinschecker comes from the base tree (the #640 property), so this PR's own CI judges pins only and the list starts enforcing on the next pull request built after this merges.HugoXK commentedon Nov 15, 2026
Verdict is in: PASS at
bb1c165b112bede7145855eba0e39386b382e6ce(review5910724066,Written-by: HugoXK-bot, 2026-11-15T12:31:25Z).bb1c165b· tree2c8a75b2c14ce8a3989d654415bb7601aee9ead8· base7d1e3ef1f809286768ace84ec420a1d8d576fa69· T3 · 6 files+260/−15review-gatesuccess (12:31:54Z),ci-oksuccess;mergeable: true / clean; labelreview:approvedowner/reporeduction,not-allowedvsnot-pinned, both-direction allowlist test, base-tree ordering, owner-only repository setting)Enforcement note, unchanged from the PR body: the checker and list are read from the base tree, so this PR's own CI judges pins with the old checker and the allowlist starts rejecting at the first PR after the merge.
Merging is the Lead's action; the issue closes with the merge.
ci: allow only the reviewed GitHub Actions (#650) (#838)