CVE-2026-28804

MEDIUM EPSS 31.7%
Published Mar 6, 20263mo ago · Modified Mar 10, 20263mo ago
6.9 CVSS 4.0
Medium
Find Similar
Published Mar 6, 2026 3mo ago
Last Modified Mar 10, 2026 3mo ago

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

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
31.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-407

Affected Products 1

VendorProductVersionRange
pypdf_projectpypdf* <6.7.5

References 4

  • github.com https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f
    Patch
  • github.com https://github.com/py-pdf/pypdf/pull/3666
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/releases/tag/6.7.5
    ProductRelease Notes
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852
    PatchVendor Advisory

Remediation

  • github.com https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f
    Patch
  • github.com https://github.com/py-pdf/pypdf/pull/3666
    Issue TrackingPatch
  • github.com https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852
    PatchVendor Advisory