CVE-2026-33123

ADVISORY - github

Summary

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and/or large memory usage. This requires accessing an array-based stream with lots of entries.

Patches

This has been fixed in pypdf==6.9.1.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3686.

EPSS Score⁠: 0.00349 (0.270)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-400⁠

Uncontrolled Resource Consumption

CWE-407⁠

Inefficient Algorithmic Complexity

ADVISORY - github

CWE-400⁠

Uncontrolled Resource Consumption

CWE-407⁠

Inefficient Algorithmic Complexity

ADVISORY - redhat

CWE-770⁠

Allocation of Resources Without Limits or Throttling

Impacted images

Advisories

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