CVE-2026-49461

pypdf: Possible large memory usage for form XObjects during text extraction

State: Published
Severity: 6.9 Medium
Published: Jun 22, 2026
Updated: Jun 23, 2026
Reserved: May 30, 2026

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.12.2, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references. This vulnerability is fixed in 6.12.2.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
pypdfpy-pdf	< 6.12.2Affected

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-j543-4vmf-qm7v
https://github.com/py-pdf/pypdf/pull/3805
https://github.com/py-pdf/pypdf/releases/tag/6.12.2

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