CVE-2026-31826

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.

PUBLISHED Reserved 2026-03-09 | Published 2026-03-10 | Updated 2026-03-11 | Assigner GitHub_M

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

References

github.com/.../pypdf/security/advisories/GHSA-hqmh-ppp3-xvm7

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

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

cve.org (CVE-2026-31826)

nvd.nist.gov (CVE-2026-31826)

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