CVE-2023-27581

High

Description

github-slug-action is a GitHub Action to expose slug value of GitHub environment variables inside of one's GitHub workflow. Starting in version 4.0.0` and prior to version 4.4.1, this action uses the `github.head_ref` parameter in an insecure way. This vulnerability can be triggered by any user on GitHub on any workflow using the action on pull requests. They just need to create a pull request with a branch name, which can contain the attack payload. This can be used to execute code on the GitHub runners and to exfiltrate any secrets one uses in the CI pipeline. A patched action is available in version 4.4.1. No workaround is available.

SeverityHigh
CVSS8.8
Exploit probability—
ProductGithub-slug-action
PublishedMar 13, 2023
First seenMar 13, 2023

How to fix

Update
  • github-slug-action_project github-slug-action4.4.1 or later

Affected products

ProductAffected versionsFixed in
github-slug-action_project github-slug-action4.0.0 ≤ v < 4.4.14.4.1

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