CVE-2026-90959Pulpcore: pulpcore: file:// scheme allowlist bypass in content upload file_url field enables arbitrary file read and pulp container registry signing key theft

Beschreibung

A path traversal vulnerability was found in pulpcore. The content upload API accepts a 'file_url' parameter that allows users with file repository privileges to specify a local file URL for Pulp to download and store. A URL scheme validation check uses a string prefix comparison that only rejects URLs beginning with 'file://', but Python's URL parser recognizes the 'file:' scheme without double slashes, creating a mismatch between what is validated and what is dispatched to the file downloader. An authenticated user with low-privilege repository permissions can supply a specially crafted URL using relative path traversal sequences to read any file accessible to the Pulp server process. In deployments that include Pulp Container, successful exploitation allows an attacker to read the container registry token signing private key and forge bearer tokens, granting unauthorized access to all private container repositories in the affected registry.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• RHSA-2026:100120 vendor-advisory
• RHSA-2026:87004 vendor-advisory
• RHSA-2026:87120 vendor-advisory
• RHSA-2026:87124 vendor-advisory
• RHSA-2026:99949 vendor-advisory
• RHSA-2026:99950 vendor-advisory
• RHSA-2026:99952 vendor-advisory
• https://access.redhat.com/security/cve/CVE-2026-90959 vdb-entry
• RHBZ#2533037 issue-tracking