Fluid Attacks Database

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
debian 13	pypdf	=5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2	-
debian 12	pypdf2	=2.12.1-3 \|\| =2.12.1-3+deb12u1 \|\| =2.12.1-4	-
pypi	pypdf	>=0 <6.7.5	6.7.5
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-2026-288042. NVD-2026-288043. OSV-DEBIAN-2026-288044. OSV-2026-288045. GHSA-9m86-7pmv-28526. GCVE-2026-288047. SECURITY-TRACKER-CVE-2026-28804

References

1. https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-28522. https://github.com/py-pdf/pypdf/pull/36663. https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f4. https://github.com/py-pdf/pypdf/releases/tag/6.7.5

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