Fluid Attacks Database

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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
debian 14	pypdf	=5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1	-
debian 12	pypdf	=3.17.4-1 \|\| =3.4.1-1 \|\| =3.4.1-1+deb12u1 \|\| =4.0.0-1 \|\| =4.0.0-1~exp1 \|\| =4.0.1-1 \|\| =4.0.2-1 \|\| =4.1.0-1 \|\| =4.2.0-1 \|\| =4.3.1-1 \|\| =5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1	-
debian 12	pypdf2	=2.12.1-3 \|\| =2.12.1-3+deb12u1 \|\| =2.12.1-4	-
debian 11	pypdf2	=1.26.0-4 \|\| =1.26.0-4+deb11u1 \|\| =1.27.12-1 \|\| =1.27.9-1 \|\| =2.0.0-1 \|\| =2.10.0-1 \|\| =2.10.2-1 \|\| =2.10.3-1 \|\| =2.10.4-1 \|\| =2.10.5-1 \|\| =2.10.7-1 \|\| =2.10.9-1 \|\| =2.11.0-1 \|\| =2.11.1-1 \|\| =2.11.2-1 \|\| =2.12.1-1 \|\| =2.12.1-2 \|\| =2.12.1-3 \|\| =2.12.1-4 \|\| =2.4.1-1 \|\| =2.4.2-1 \|\| =2.6.0-1 \|\| =2.8.1-1 \|\| =2.9.0-1	-
debian 13	pypdf	=5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1	-
pypi	pypdf	>=0 <6.10.1	6.10.1

Aliases

1. CVE-2026-411682. NVD-2026-411683. OSV-DEBIAN-2026-411684. OSV-2026-411685. GHSA-jj6c-8h6c-hppx6. GCVE-2026-411687. SECURITY-TRACKER-CVE-2026-41168

References

1. https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx2. https://github.com/py-pdf/pypdf/pull/37333. https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b34. https://github.com/py-pdf/pypdf/releases/tag/6.10.1

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