Fluid Attacks Database

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.15.0, a crafted PDF can cause large memory consumption when pypdf/_cmap.py function parse_bfrange parses unusually large source-code or destination-string tokens in a font /ToUnicode CMap during text extraction. This issue is fixed in 6.15.0.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
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	-
pypi	pypdf	>=0 <6.15.0	6.15.0
debian 12	pypdf2	=2.12.1-3 \|\| =2.12.1-3+deb12u1 \|\| =2.12.1-4	-
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
debian 13	pypdf	=5.4.0-1 \|\| =6.19.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2	-

Aliases

1. CVE-2026-718702. NVD-2026-718703. OSV-DEBIAN-2026-718704. OSV-2026-718705. GHSA-fp3f-mc75-235c6. GCVE-2026-718707. SECURITY-TRACKER-CVE-2026-71870

References

1. https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3f-mc75-235c2. https://github.com/py-pdf/pypdf/pull/39443. https://github.com/py-pdf/pypdf/commit/afba8080e19d29a3c256a742b340995e695b35aa4. https://github.com/py-pdf/pypdf/releases/tag/6.15.0

Does your application use this vulnerable software?

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