CVE-2026-102998pypdf: Possible long runtimes when generating appearance streams

Descripción

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.

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-php9-fj8v-98fj Vendor Advisory
• https://github.com/py-pdf/pypdf/pull/4087 PatchIssue Tracking
• https://github.com/py-pdf/pypdf/commit/959467a9b95be83e2dc5ae873ece5f371263ede7 Patch
• https://github.com/py-pdf/pypdf/releases/tag/6.19.0 Release Notes