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CVE-2026-31826

Published: Mar 10, 2026

Modified: Mar 11, 2026

PUBLISHED

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.

Vendor	Product	Versions
py-pdf	pypdf	affected `< 6.8.0`

Weaknesses (CWE)

References

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

x_refsource_CONFIRM

https://github.com/py-pdf/pypdf/pull/3675

x_refsource_MISC

https://github.com/py-pdf/pypdf/releases/tag/6.8.0

x_refsource_MISC

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