CVE-2026-102999

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/_doc_common.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when an application accesses the embedded-file mapping. This issue is fixed in version 6.19.0.

• CWE-400
• CWE-407

• https://github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3Patch
• https://github.com/py-pdf/pypdf/pull/4081Patch, Issue Tracking
• https://github.com/py-pdf/pypdf/releases/tag/6.19.0Release Notes
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcjVendor Advisory

Published

Sep 30, 2026

Last Modified

Nov 2, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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