CVE-2026-113791pypdf: Possible large memory usage when parsing content streams

Descripción

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c Vendor AdvisoryPatch
• https://github.com/py-pdf/pypdf/pull/4218 Issue TrackingPatch
• https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12 Patch
• https://github.com/py-pdf/pypdf/releases/tag/6.21.0 Release Notes