fkie_cve-2024-48908

lychee link checking action checks links in Markdown, HTML, and text files using lychee. Prior to version 2.0.2, there is a potential attack of arbitrary code injection vulnerability in lychee-setup of the composite action at action.yml. This issue has been patched in version 2.0.2.

GHSA-65rg-554r-9j5x — lychee link checking action affected by arbitrary code injection in composite action

Affected: GitHub Actions: lycheeverse/lychee-action

### Summary

There is a potential attack of arbitrary code injection vulnerability in `lychee-setup` of the composite action at *action.yml*.

### Details

The GitHub Action variable `inputs.lycheeVersion` can be used to execute arbitrary code in the context of the action.

### PoC

```yaml - uses: lycheeverse/lychee@v2 with: lycheeVersion: $(printenv >> $GITHUB_STEP_SUMMARY && echo "v0.16.1") ```

The previous example will just print all the environment variables to the summary of the workflow, but an attacker could potentially use this vector to compromise the security of the target repository, even passing unnotice because the action will run normally.

### Impact

Low

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fkie_cve-2024-48908

GHSA-65rg-554r-9j5x — lychee link checking action affected by arbitrary code injection in composite action