ci: declare workflow-level contents: read on the 11 remaining workflows#123
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arpitjain099 wants to merge 1 commit into
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ci: declare workflow-level contents: read on the 11 remaining workflows#123arpitjain099 wants to merge 1 commit into
contents: read on the 11 remaining workflows#123arpitjain099 wants to merge 1 commit into
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Pins the default GITHUB_TOKEN to contents: read on the 11 workflows in .github/workflows/ that don't actually need any write scope: - bundled_gems.yml, coverage.yml, doxygen.yml, test_ruby_versions.yml, update_ci_versions.yml: test/build/lint workflows, no GitHub API. - snapshot-master.yml, snapshot-ruby_3_3.yml, snapshot-ruby_3_4.yml, snapshot-ruby_4_0.yml: build snapshot tarballs and upload as workflow artifacts; no GitHub API mutation. - remove-tmp-package.yml: removes files from S3 and purges the Fastly cache; AWS creds only, no GITHUB_TOKEN use. - update_index.yml: updates the index via AWS S3 creds; no GITHUB_TOKEN use. draft-release.yml is intentionally left implicit; it needs write scopes that are best declared by a maintainer. 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>
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Pins the default
GITHUB_TOKENtocontents: readon the 11 workflows in.github/workflows/that don't actually need any write scope:bundled_gems.yml,coverage.yml,doxygen.yml,test_ruby_versions.yml,update_ci_versions.yml: test, lint, and coverage workflows. No GitHub API call beyond the initial checkout.snapshot-master.yml,snapshot-ruby_3_3.yml,snapshot-ruby_3_4.yml,snapshot-ruby_4_0.yml: build the Ruby snapshot tarballs and upload them as workflow artifacts. No GitHub API mutation.remove-tmp-package.yml: removes files froms3://ftp.r-l.o/pub/tmp/and purges the Fastly cache. AWS credentials only, noGITHUB_TOKENuse.update_index.yml: updates the index via AWS S3 credentials; noGITHUB_TOKENuse.draft-release.ymlis left implicit on purpose; it needs write scopes that are best declared by a maintainer who knows the release flow.Why
CVE-2025-30066 (March 2025
tj-actions/changed-filessupply-chain compromise) exfiltratedGITHUB_TOKENfrom workflow logs and the leaked token retained whatever scope was issued at the workflow level. Pinning per workflow caps that 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 ScorecardToken-Permissionscheck.YAML validated locally with
yaml.safe_loadon each touched file.