CVE-2026-41313

MEDIUM EPSS 11.7%
Published Apr 22, 20262mo ago · Modified Jun 17, 20262w ago
4.8 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 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

CVSS Details

Base Score
4.8
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/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 Local
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
11.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-834

Affected Products 1

VendorProductVersionRange
pypdf_projectpypdf* <6.10.2

References 4

  • github.com https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a
    Patch
  • github.com https://github.com/py-pdf/pypdf/pull/3735
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/releases/tag/6.10.2
    Release Notes
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw
    PatchVendor Advisory

Remediation

  • github.com https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a
    Patch
  • github.com https://github.com/py-pdf/pypdf/pull/3735
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw
    PatchVendor Advisory