CVE-2026-54651

MEDIUM EPSS 1.6%
Published Jun 22, 20261w ago · Modified Jun 24, 20261w ago
6.9 CVSS 4.0
Medium
Find Similar
Published Jun 22, 2026 1w ago
Last Modified Jun 24, 2026 1w ago

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.13.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with threads/articles into a writer. This vulnerability is fixed in 6.13.1.

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
1.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-835

Affected Products 1

VendorProductVersionRange
pypdf_projectpypdf* <6.13.1

References 3

  • github.com https://github.com/py-pdf/pypdf/pull/3839
    Issue Tracking
  • github.com https://github.com/py-pdf/pypdf/releases/tag/6.13.1
    Patch
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9xf-7f8q-9mcj
    MitigationPatchVendor Advisory

Remediation

  • github.com https://github.com/py-pdf/pypdf/releases/tag/6.13.1
    Patch
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9xf-7f8q-9mcj
    MitigationPatchVendor Advisory