CVE-2026-27025

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/commit/77d7b8d7cfbe8dd179858dfa42666f73fc6e57a2	Patch
https://github.com/py-pdf/pypdf/pull/3646	Issue Tracking Patch
https://github.com/py-pdf/pypdf/releases/tag/6.7.1	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-wgvp-vg3v-2xq3	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-20 22:16

Updated : 2026-02-24 15:16

NVD link : CVE-2026-27025

Mitre link : CVE-2026-27025

CVE.ORG link : CVE-2026-27025

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-834

Excessive Iteration

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