CVE-2026-13346

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/pypa/pip/pull/14110	Issue Tracking Patch
https://mail.python.org/archives/list/security-announce@python.org/thread/L2BNQGGVQCEV7DROOORQ7WFKKFF2OOQX/	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/07/29/7	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pypa:pip:*:*:*:*:*:*:*:*

History

24 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) pip manejaría incorrectamente las URLs de paquetes doblemente codificadas de los índices, permitiendo la instalación de archivos en ubicaciones arbitrarias en el disco incluso al instalar wheels. Esta vulnerabilidad requiere descargar o instalar un paquete de un índice de paquetes malicioso para tener éxito; los paquetes maliciosos por sí solos no son capaces de explotar esta vulnerabilidad. Tenga en cuenta que esta vulnerabilidad solo afecta materialmente a los usuarios que ejecutan ’pip download’ con la opción ’--only-binary’, ya que instalar distribuciones de código fuente de un índice no confiable ya es una operación insegura que ejecuta código durante la instalación.

Information

Published : 2026-07-29 19:16

Updated : 2026-10-24 13:10

NVD link : CVE-2026-13346

Mitre link : CVE-2026-13346

CVE.ORG link : CVE-2026-13346

JSON object : View

Products Affected

pypa

pip

CWE

CWE-36

Absolute Path Traversal

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Tenga en cuenta que esta vulnerabilidad solo afecta materialmente a los usuarios que ejecutan \u2019pip download\u2019 con la opci\u00f3n \u2019--only-binary\u2019, ya que instalar distribuciones de c\u00f3digo fuente de un \u00edndice no confiable ya es una operaci\u00f3n insegura que ejecuta c\u00f3digo durante la instalaci\u00f3n."}], "lastModified": "2026-10-24T13:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:pypa:pip:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CE28D586-A850-47BB-9629-2C6B1069A090", "versionEndExcluding": "26.2"}], "operator": "OR"}]}], "sourceIdentifier": "cna@python.org"}