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ci: declare workflow-level contents: read on 6 workflows#6897

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ytmimi merged 1 commit into
rust-lang:mainfrom
arpitjain099:chore/declare-workflow-perms-readonly
May 22, 2026
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ci: declare workflow-level contents: read on 6 workflows#6897
ytmimi merged 1 commit into
rust-lang:mainfrom
arpitjain099:chore/declare-workflow-perms-readonly

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Pins the default GITHUB_TOKEN to contents: read on 6 workflows in .github/workflows/ that don't call a GitHub API beyond the initial checkout.

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>
@rustbot rustbot added A-CI Area: CI S-waiting-on-review Status: awaiting review from the assignee but also interested parties. labels May 15, 2026
@ytmimi ytmimi merged commit 348794e into rust-lang:main May 22, 2026
26 checks passed
@rustbot rustbot added release-notes Needs an associated changelog entry and removed S-waiting-on-review Status: awaiting review from the assignee but also interested parties. labels May 22, 2026
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3 participants