Fix vulnerability and switch to npm#262
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📝 WalkthroughWalkthroughThis PR migrates the project's package management from pnpm to npm. Changes include updating the CI workflow to use Changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Possibly related PRs
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🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In @.github/workflows/ci.yml:
- Line 35: The workflow currently uses a mutable tag "actions/cache@v4"; update
the step that references actions/cache to pin it to the full commit SHA
(0057852bfa1d2a6c5884b8e6588e233eb3b10a0d) so it becomes actions/cache@<sha>
(i.e., use the specific commit for the uses: entry) to avoid relying on a
mutable tag; locate the uses: actions/cache@v4 line in the CI workflow and
replace the tag with the provided SHA.
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- Create a new PR with the fixes
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Review profile: CHILL
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⛔ Files ignored due to path filters (2)
package-lock.jsonis excluded by!**/package-lock.jsonpnpm-lock.yamlis excluded by!**/pnpm-lock.yaml
📒 Files selected for processing (5)
.github/workflows/ci.yml.prettierignoreflake.nixpackage.jsonpnpm-workspace.yaml
💤 Files with no reviewable changes (1)
- pnpm-workspace.yaml
| echo "directory=$(nix develop --command npm config get cache | tr -d '\n')" >> $GITHUB_OUTPUT | ||
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| - name: Set up npm cache | ||
| uses: actions/cache@v4 |
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🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
set -euo pipefail
# Resolve the current commit behind v4 so it can be pinned explicitly.
# Requires gh CLI auth in environments where API rate limits apply.
gh api repos/actions/cache/commits/v4 --jq '.sha'Repository: DeterminateSystems/update-flake-lock
Length of output: 240
🏁 Script executed:
# Check the actual file content at line 35
sed -n '30,40p' .github/workflows/ci.ymlRepository: DeterminateSystems/update-flake-lock
Length of output: 524
🌐 Web query:
GitHub Actions actions/cache v4 commit SHA pinning best practices supply chain security
💡 Result:
Best practices for using GitHub Actions actions/cache@v4 with commit SHA pinning for supply chain security: 1. Pin to a full-length commit SHA instead of a tag like @v4. Tags are mutable and can be updated to malicious code by repository owners with write access, creating a supply chain attack vector. Full SHA pinning ensures immutability, as changing the code would require a SHA-1 collision. 2. Official GitHub recommendation from security docs: "Pin actions to a full-length commit SHA. Pinning an action to a full-length commit SHA is currently the only way to use an action as an immutable release." 3. For actions/cache specifically, the repository recommends using the SHA of version v4.2.0 or later (e.g., v4.3.0 as of Sep 2025) for pinning, especially due to backend changes in v4.2.0. Examples from releases: v4.3.0 SHA is 0057852bfa..., v4.2.3 SHA is 5a3ec84... To find the exact full SHA for a tag: - Go to https://github.com/actions/cache/releases - Select the tag (e.g., v4.3.0) - Copy the full commit SHA from the release page or tag commit. Example pinned usage: uses: actions/cache@0057852 # v4.3.0 4. Additional practices: - Use tools like ratchet or pin-github-action to automate pinning and updates. - Enable organization/repository policies to enforce SHA pinning. - Use Dependabot to update pinned SHAs to newer secure versions. - Audit action source code and monitor for vulnerabilities via GitHub dependency graph. This mitigates risks from compromised actions, as seen in real incidents like TJ-Actions breach.
Citations:
- 1: https://github.com/actions/cache
- 2: https://stackoverflow.com/questions/78903499/how-do-i-pin-an-action-to-a-specific-sha
- 3: https://github.blog/changelog/2025-08-15-github-actions-policy-now-supports-blocking-and-sha-pinning-actions/
- 4: https://github.com/actions/cache/tree/v4
- 5: https://docs.github.com/en/actions/reference/security/secure-use
- 6: https://github.com/actions/cache/releases
🌐 Web query:
actions/cache@v4 GitHub commit hash what version
💡 Result:
The latest version under the actions/cache@v4 tag/branch is v4.3.0, released on 2025-09-24. Its commit hash is 0057852bfa (short SHA 0057852). This is the commit for the v4.3.0 tag, as shown on the releases page and mirrors. Official docs recommend pinning to v4.2.0 SHA for stability during migration, but v4.3.0 is the current latest for @v4. The v4 branch points to this latest state with 671 commits as of recent data.
Citations:
- 1: https://github.com/actions/cache/tree/v4
- 2: https://github.com/actions/cache/blob/main/RELEASES.md
- 3: https://git.d.aiengines.ir/actions/cache/src/tag/v4
- 4: actions/cache@0400d5f
- 5: https://github.com/actions/cache/releases
- 6: https://newreleases.io/project/github/actions/cache/release/v4.3.0
Pin actions/cache to a commit SHA.
Using actions/cache@v4 relies on a mutable tag. GitHub's official security guidance recommends pinning actions to a full-length commit SHA to prevent supply chain attacks where a compromised maintainer could update the tag to malicious code. The current latest version is v4.3.0 (commit 0057852bfa1d2a6c5884b8e6588e233eb3b10a0d). Update to:
uses: actions/cache@0057852bfa1d2a6c5884b8e6588e233eb3b10a0d # v4.3.0
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In @.github/workflows/ci.yml at line 35, The workflow currently uses a mutable
tag "actions/cache@v4"; update the step that references actions/cache to pin it
to the full commit SHA (0057852bfa1d2a6c5884b8e6588e233eb3b10a0d) so it becomes
actions/cache@<sha> (i.e., use the specific commit for the uses: entry) to avoid
relying on a mutable tag; locate the uses: actions/cache@v4 line in the CI
workflow and replace the tag with the provided SHA.
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