Fluid Attacks Database

Description

pypdf: Possible large memory usage when retrieving Roman page labels

Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires accessing the page labels of a document with large Roman numerals.

Patches

This has been fixed in pypdf==6.17.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4047.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
pypi	pypdf	>=0 <6.17.0	6.17.0
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 \|\| =6.19.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2	-
debian 13	pypdf	=5.4.0-1 \|\| =6.19.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2	-
debian 14	pypdf	=5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2 \|\| >=0 <6.19.0-1	6.19.0-1

Aliases

1. CVE-2026-1029932. NVD-2026-1029933. OSV-2026-1029934. OSV-DEBIAN-2026-1029935. GHSA-qv6h-rv94-w2856. GCVE-2026-1029937. SECURITY-TRACKER-CVE-2026-102993

References

1. https://github.com/py-pdf/pypdf/security/advisories/GHSA-qv6h-rv94-w2852. https://github.com/py-pdf/pypdf/pull/40473. https://github.com/py-pdf/pypdf/commit/89db7c4fe9315ecc964bfdf05a4e8c4b941751634. https://github.com/py-pdf/pypdf/releases/tag/6.17.0

Does your application use this vulnerable software?

During the free trial, our tools assess your application, identify vulnerabilities, and provide recommendations for their remediation.