Fluid Attacks Database

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the children of a TreeObject, for example as part of outlines. This vulnerability is fixed in 6.7.1.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
pypi	pypdf	>=0 <6.7.1	6.7.1
debian 12	pypdf2	=2.12.1-3 \|\| =2.12.1-3+deb12u1 \|\| =2.12.1-4	-
debian 13	pypdf	=5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2	-
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 \|\| =6.9.2-2	-
debian 14	pypdf	=5.4.0-1 \|\| >=0 <6.9.0-1	6.9.0-1

Aliases

1. CVE-2026-270242. NVD-2026-270243. OSV-2026-270244. OSV-DEBIAN-2026-270245. GHSA-996q-pr4m-cvgq6. GCVE-2026-270247. SECURITY-TRACKER-CVE-2026-27024

References

1. https://github.com/py-pdf/pypdf/security/advisories/GHSA-996q-pr4m-cvgq2. https://github.com/py-pdf/pypdf/pull/36453. https://github.com/py-pdf/pypdf/commit/bd2f6d052fe5941e85e37082c2a43453d48d12954. https://github.com/py-pdf/pypdf/releases/tag/6.7.1

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