---
cve: "CVE-2023-49291"
severity: "CRITICAL"
cvss: 9.3
epss: "1.5%"
vendor: "tj-actions"
kev: false
exploited: false
published: "2023-12-05 00:15:09"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T09:14:01+02:00"
---

# CVE-2023-49291

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 604fda4f4254216e3b564d60fe27d68017756558 (Commit)
- 6c999acf206f5561e19f46301bb310e9e70d8815 (Commit)

## Referenzen

- <https://github.com/tj-actions/branch-names/security/advisories/GHSA-8v8w-v8xg-79rf>
- <https://github.com/tj-actions/branch-names/commit/4923d1ca41f928c24f1c1b3af9daaadfb71e6337>
- <https://github.com/tj-actions/branch-names/commit/6c999acf206f5561e19f46301bb310e9e70d8815>
- <https://github.com/tj-actions/branch-names/commit/726fe9ba5e9da4fcc716223b7994ffd0358af060>
- <https://securitylab.github.com/research/github-actions-untrusted-input>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-49291) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_