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CVE-2026-24688

MEDIUM

4.3

Description

pypdf is a free and open-source pure-python PDF library. An attacker who uses an infinite loop vulnerability that is present in versions prior to 6.6.2 can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks. This has been fixed in pypdf 6.6.2. If projects cannot upgrade yet, consider applying the changes from PR #3610 manually.

CVE Details

CVSS v3.1 Score4.3

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published1/27/2026

Last Modified2/25/2026

Sourcenvd

Honeypot Sightings0

Affected Products

pypdf_project:pypdf

Weaknesses (CWE)

CWE-835

References

https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1(security-advisories@github.com)

https://github.com/py-pdf/pypdf/pull/3610(security-advisories@github.com)

https://github.com/py-pdf/pypdf/releases/tag/6.6.2(security-advisories@github.com)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73(security-advisories@github.com)

IOC Correlations

No correlations recorded

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