CVE-2026-41168

Description

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.

PUBLISHED Reserved 2026-04-17 | Published 2026-04-22 | Updated 2026-04-23 | Assigner GitHub_M

Problem types

CWE-834: Excessive Iteration

Product status

References

github.com/.../pypdf/security/advisories/GHSA-jj6c-8h6c-hppx

github.com/py-pdf/pypdf/pull/3733

github.com/...ommit/62338e9d36419cf193ccec7331784f45df1d70b3

github.com/py-pdf/pypdf/releases/tag/6.10.1

cve.org (CVE-2026-41168)

nvd.nist.gov (CVE-2026-41168)

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