---
cve: "CVE-2026-13346"
severity: "MEDIUM"
cvss: 5.6
epss: "0.3%"
vendor: "Python Packaging Authority"
kev: false
exploited: false
published: "2026-07-29 19:16:44"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T07:49:45+02:00"
---

# CVE-2026-13346

> 5.6 MEDIUM · 🧪 PoC

## Beschreibung

pip would incorrectly handle doubly-encoded package URLs from indexes allowing for files to be installed to arbitrary locations on disk even when installing wheels.




This vulnerability requires downloading or installing a package from a malicious package index to succeed, malicious packages alone are not able to exploit this vulnerability. Note that this vulnerability only materially impacts users running `pip download` with the `--only-binary` option as installing source distributions from an untrusted index is already an unsafe operation that executes code during install time.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Hoch | good |

## Patch verfügbar (OSV)

- 4b6ae5c4d7d63a61a99fbecbead8dbc35cc8b357 (Commit)

## Referenzen

- <https://github.com/pypa/pip/pull/14110>
- <https://mail.python.org/archives/list/security-announce@python.org/thread/L2BNQGGVQCEV7DROOORQ7WFKKFF2OOQX/>
- <http://www.openwall.com/lists/oss-security/2026/07/29/7>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-13346) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_