CVE-2026-102998

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF with form field values can cause pypdf/generic/_appearance_stream.py appearance-stream generation to repeat invariant selection-data work inside a loop when an application updates fields with flattening enabled, resulting in excessive runtimes and application unavailability. This issue is fixed in version 6.19.0.

• CWE-400

• https://github.com/py-pdf/pypdf/commit/959467a9b95be83e2dc5ae873ece5f371263ede7
• https://github.com/py-pdf/pypdf/pull/4087
• https://github.com/py-pdf/pypdf/releases/tag/6.19.0
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-php9-fj8v-98fj

Published

Sep 30, 2026

Last Modified

Oct 1, 2026

Status

Awaiting Analysis

• 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.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-102992piscina is a node.js worker pool implementation. Prior to 4.…9.2
• CVE-2026-102993pypdf is a free and open-source pure-python PDF library. Pri…8.7
• CVE-2026-102994pypdf is a free and open-source pure-python PDF library. Pri…8.7
• CVE-2026-102995pypdf is a free and open-source pure-python PDF library. Pri…8.7
• CVE-2026-102996pypdf is a free and open-source pure-python PDF library. Pri…8.7
• CVE-2026-102997pypdf is a free and open-source pure-python PDF library. Pri…8.7
• CVE-2026-102999pypdf is a free and open-source pure-python PDF library. Pri…8.7
• CVE-2026-1030IBM Common Licensing Agent 9.0, Agent 9.0.0.1, Agent 9.0.0.2…4.3
• CVE-2026-10300A security vulnerability has been detected in SGLang 0.5.10.…3.7
• CVE-2026-103000pypdf is a free and open-source pure-python PDF library. Pri…8.7
• CVE-2026-103001PyJWT is a Python implementation of JSON Web Token standards…6.5
• CVE-2026-10301A vulnerability was detected in itsourcecode Fees Management…4.3