CVE-2026-27025

MEDIUM EPSS 6.4%
Published Feb 20, 20264mo ago · Modified Jun 17, 20262w ago
6.9 CVSS 4.0
Medium
Find Similar
Published Feb 20, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
6.9
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
6.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-834

Affected Products 1

VendorProductVersionRange
pypdf_projectpypdf* <6.7.1

References 4

  • github.com https://github.com/py-pdf/pypdf/commit/77d7b8d7cfbe8dd179858dfa42666f73fc6e57a2
    Patch
  • github.com https://github.com/py-pdf/pypdf/pull/3646
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/releases/tag/6.7.1
    ProductRelease Notes
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-wgvp-vg3v-2xq3
    PatchVendor Advisory

Remediation

  • github.com https://github.com/py-pdf/pypdf/commit/77d7b8d7cfbe8dd179858dfa42666f73fc6e57a2
    Patch
  • github.com https://github.com/py-pdf/pypdf/pull/3646
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-wgvp-vg3v-2xq3
    PatchVendor Advisory