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ci: declare workflow-level contents: read on 3 workflows - #990

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arpitjain099:chore/declare-workflow-perms-readonly
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ci: declare workflow-level contents: read on 3 workflows#990
arpitjain099 wants to merge 1 commit into
facebook:mainfrom
arpitjain099:chore/declare-workflow-perms-readonly

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@arpitjain099

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Pins the default GITHUB_TOKEN to contents: read on 3 workflows in .github/workflows/ that don't call a GitHub API beyond the initial checkout.

The following files were left implicit because they reference GITHUB_TOKEN / use a write-scope action / trigger on pull_request_target. Those scopes are best declared by maintainers: build_and_test.yml.

Why

CVE-2025-30066 (March 2025 tj-actions/changed-files supply-chain compromise) exfiltrated GITHUB_TOKEN from workflow logs. Pinning per workflow caps runtime authority irrespective of the repo or org default, gives drift protection if the default ever widens, and is credited per-file by the OpenSSF Scorecard Token-Permissions check.

YAML validated locally with yaml.safe_load on each touched file.

Pins the default GITHUB_TOKEN to contents: read on the workflows in
.github/workflows/ that don't call a GitHub API beyond the initial
checkout. The other workflows in this directory are left implicit
because they need write scopes that a maintainer is better placed
to declare.

Motivation: CVE-2025-30066 (March 2025 tj-actions/changed-files
compromise) exfiltrated GITHUB_TOKEN from workflow logs. Per-workflow
caps bound runtime authority irrespective of repo or org default,
give drift protection if the default ever widens, and are credited
per-file by the OpenSSF Scorecard Token-Permissions check.

YAML validated locally with yaml.safe_load.

Signed-off-by: Arpit Jain <arpitjain099@gmail.com>
@meta-cla meta-cla Bot added the CLA Signed label May 15, 2026
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meta-codesync Bot commented May 15, 2026

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@xuhdev has imported this pull request. If you are a Meta employee, you can view this in D105383687.

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meta-codesync Bot commented May 16, 2026

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@xuhdev merged this pull request in 34848a7.

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