---
cve: "CVE-2026-82049"
severity: "HIGH"
cvss: 8.4
epss: "18%"
vendor: "Python Software Foundation"
kev: false
exploited: false
published: "2026-09-14 19:17:50"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T22:34:41+02:00"
---

# CVE-2026-82049

> 8.4 HIGH · 🧪 PoC

## Beschreibung

In CPython 3.13 and earlier, the tarfile module's data and tar extraction filters are vulnerable to crafted archives containing a hard link to a symbolic link. Such archives may cause extraction to modify the permissions or modification time of a file outside the destination directory, or expose the contents of that file within the extracted tree.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 5a57248b22ad3b9aafcaaadae2c304a1923daeca (Commit)
- b38be2e6cf9d989075ab73412c63e003ebad4ff3 (Commit)

## Referenzen

- <https://github.com/python/cpython/commit/5a57248b22ad3b9aafcaaadae2c304a1923daeca>
- <https://github.com/python/cpython/issues/157190>
- <https://github.com/python/cpython/pull/157191>
- <https://mail.python.org/archives/list/security-announce@python.org/thread/EFJWGAZJA56AKSBR2WHMHQZO7RRLZPRH/>
- <https://github.com/python/cpython/commit/b38be2e6cf9d989075ab73412c63e003ebad4ff3>
- <https://github.com/python/cpython/commit/b8f23e307097552eaea2604383a12ab280520d0d>
- <http://www.openwall.com/lists/oss-security/2026/09/14/27>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-82049) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_