CVE-2026-113786CWE-183CWE-20

CVE-2026-113786

published October 21, 2026

CVSS
2.3
EPSS
0%
Percentile
30.3
In the wild
Unconfirmed
What it is

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke an unintended image parser when the image is loaded. Environments without the optional Pillow dependency are not affected. This issue is fixed in version 6.21.1.

The record
Technical detail
CVSS
2.3 · NONE
CVSS v4.0
2.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00375 · 30.3th percentile
Weaknesses
CWE-183 · Permissive List of Allowed Inputs; CWE-20 · Improper Input Validation
Published
2026-10-21T19:17Z
References (4)
https://github.com/py-pdf/pypdf/commit/512d8eb94eb04be1d1c90504e6da2dcef8679e07 · [email protected]https://github.com/py-pdf/pypdf/pull/4222 · [email protected]https://github.com/py-pdf/pypdf/releases/tag/6.21.1 · [email protected]https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hx5-vpf9-5wcv · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 21 OCT 14:38Z
    pypdf: Unvalidated JPEG image data loading
    cvelistv5
  • 21 OCT 14:38Z
    pypdf: Unvalidated JPEG image data loading
    cvelistv5