CVE-2026-31826

MEDIUM

5.5

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.8.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stream with a rather large /Length value, regardless of the actual data length inside the stream. This vulnerability is fixed in 6.8.0.

CVE Details

CVSS v3.1 Score5.5

SeverityMEDIUM

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

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published3/10/2026

Last Modified3/17/2026

Sourcenvd

Honeypot Sightings0

Affected Products

pypdf_project:pypdf

Weaknesses (CWE)

CWE-770

References

https://github.com/py-pdf/pypdf/pull/3675(security-advisories@github.com)

https://github.com/py-pdf/pypdf/releases/tag/6.8.0(security-advisories@github.com)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-hqmh-ppp3-xvm7(security-advisories@github.com)

IOC Correlations

No correlations recorded

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