NVD HIGH: CVE-2026-102998 — pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a craf...

Wednesday, September 30, 2026 at 09:17 PM UTC·Source: NIST NVD

Updated: Monday, October 5, 2026 at 04:00 PM UTC

Executive Summary

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.

Analysis

Indicators of Compromise (1)

CVE (1)

CVE-2026-102998

NVD MITRE CVE

Source Attribution

Originally published by NIST NVD on Sep 30, 2026. Verified by: NIST.

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