CVE-2026-41168

MEDIUM EPSS 21.3%
Published Apr 22, 20262mo ago · Modified Jun 17, 20262w ago
6.9 CVSS 4.0
Medium
Find Similar
Published Apr 22, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.

CVSS Details

Base Score
6.9
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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 Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
21.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-834

Affected Products 1

VendorProductVersionRange
pypdf_projectpypdf* <6.10.1

References 4

  • github.com https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3
    Patch
  • github.com https://github.com/py-pdf/pypdf/pull/3733
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/releases/tag/6.10.1
    ProductRelease Notes
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx
    MitigationPatchVendor Advisory

Remediation

  • github.com https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3
    Patch
  • github.com https://github.com/py-pdf/pypdf/pull/3733
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx
    MitigationPatchVendor Advisory