---
cve: "CVE-2026-7774"
severity: "MEDIUM"
cvss: 6.9
epss: "60%"
vendor: "Python Software Foundation"
kev: false
exploited: false
published: "2026-06-04 16:16:42"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T06:32:10+02:00"
---

# CVE-2026-7774

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

tarfile.data_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() to write files outside the destination directory, subject to the permissions of the extracting process.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- 3a19c2f0b3e91ce8f23d0cc64d4c9ee557823f24 (Commit)
- 41388c9cb160d0886d5ca00d2e6c8782608a4549 (Commit)

## Referenzen

- <https://github.com/python/cpython/pull/149487>
- <https://github.com/python/cpython/issues/149486>
- <https://mail.python.org/archives/list/security-announce@python.org/thread/4FU62L2M6RMMHT2QPGQNPEHHUND7CEX5/>
- <https://github.com/python/cpython/commit/0478bd83d82b255e0f29f613367a59d261e7eaa2>
- <https://github.com/python/cpython/commit/0d28f5e46e151718972dfabd91205444d0037b6d>
- <https://github.com/python/cpython/commit/578411982c16f753f4893532510099ef665117da>
- <https://github.com/python/cpython/commit/5cf47a248c35c375d610b87b2f72fd1ed454b558>
- <https://github.com/python/cpython/commit/74cca9a92fb7d653e404843a56b8bdc7b0afdbbf>
- <https://github.com/python/cpython/commit/10a13bee3c24f9c62b602e696334ff2272a40efc>
- <https://github.com/python/cpython/commit/c063191cb7f9170f9565e305f8aa2b79ab2bf609>
- <http://www.openwall.com/lists/oss-security/2026/06/04/9>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-7774) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_