CVE-2023-49291 CRITICAL

CVE-2023-49291: Improper Sanitization of Branch Name Leads to Arbitrary Code Injection

Vendor Tj-Actions
Product branch-names
Weakness CWE-20 · Input validation
Published December 4, 2023
Last update August 2, 2024

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N

What the vulnerability does

01Description

tj-actions/branch-names is a Github action to retrieve branch or tag names with support for all events. The `tj-actions/branch-names` GitHub Actions improperly references the `github.event.pull_request.head.ref` and `github.head_ref` context variables within a GitHub Actions `run` step. The head ref variable is the branch name and can be used to execute arbitrary code using a specially crafted branch name. As a result an attacker can use this vulnerability to steal secrets from or abuse `GITHUB_TOKEN` permissions. This vulnerability has been addressed in version 7.0.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Key dates

02Disclosure timeline

December 4, 2023 CVE published
August 2, 2024 Record updated