CVE-2026-33699

MEDIUM EPSS 36.2%
Published Mar 27, 20263mo ago · Modified Jun 17, 20262w ago
4.6 CVSS 4.0
Medium
Find Similar
Published Mar 27, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.

CVSS Details

Base Score
4.6
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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
36.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-835

Affected Products 1

VendorProductVersionRange
pypdf_projectpypdf* <6.9.2

References 3

  • github.com https://github.com/py-pdf/pypdf/pull/3693
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/releases/tag/6.9.2
    ProductRelease Notes
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3
    PatchVendor Advisory

Remediation

  • github.com https://github.com/py-pdf/pypdf/pull/3693
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3
    PatchVendor Advisory