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 long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. This vulnerability is fixed in 6.7.1.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Package	Affected version	Patched versions
pypi	pypdf	>=0 <6.7.1	6.7.1
debian 14	pypdf	=5.4.0-1 \|\| >=0 <6.9.0-1	6.9.0-1
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 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 13	pypdf	=5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1	-

Aliases

1. CVE-2026-270252. NVD-2026-270253. OSV-2026-270254. OSV-DEBIAN-2026-270255. GHSA-wgvp-vg3v-2xq36. GCVE-2026-270257. SECURITY-TRACKER-CVE-2026-27025

References

1. https://github.com/py-pdf/pypdf/security/advisories/GHSA-wgvp-vg3v-2xq32. https://github.com/py-pdf/pypdf/pull/36463. https://github.com/py-pdf/pypdf/commit/77d7b8d7cfbe8dd179858dfa42666f73fc6e57a24. https://github.com/py-pdf/pypdf/releases/tag/6.7.1

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