CVE-2026-113786
Published:October 21, 2026
Updated:October 23, 2026
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.
Affected Packages
pypdf (CONDA):
Affected version(s) >=6.0.0 <6.21.1Fix Suggestion:
Update to version 6.21.1https://github.com/py-pdf/pypdf.git (GITHUB):
Affected version(s) >=6.0.0 <6.21.1Fix Suggestion:
Update to version 6.21.1pypdf (PYTHON):
Affected version(s) >=6.0.0 <6.21.1Fix Suggestion:
Update to version 6.21.1Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
EPSS
Base Score:
0.38