CVE-2026-33699

HIGH

7.5

Description

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/27/2026

Last Modified4/1/2026

Sourcenvd

Honeypot Sightings0

Affected Products

pypdf_project:pypdf

Weaknesses (CWE)

CWE-835

References

https://github.com/py-pdf/pypdf/pull/3693(security-advisories@github.com)

https://github.com/py-pdf/pypdf/releases/tag/6.9.2(security-advisories@github.com)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3(security-advisories@github.com)

IOC Correlations

No correlations recorded

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