CVE-2026-59937
Published:July 08, 2026
Updated:August 04, 2026
pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.
Affected Packages
pypdf (CONDA):
Affected version(s) >=3.2.0 <6.14.0Fix Suggestion:
Update to version 6.14.0pypdf (CONDA):
Affected version(s) >=3.2.0 <6.14.0Fix Suggestion:
Update to version 6.14.0https://github.com/py-pdf/pypdf.git (GITHUB):
Affected version(s) >=v1.17 <6.14.0Fix Suggestion:
Update to version 6.14.0pypdf (PYTHON):
Affected version(s) >=1.0 <6.14.0Fix Suggestion:
Update to version 6.14.0pypdf (PYTHON):
Affected version(s) >=1.0 <6.14.0Fix Suggestion:
Update to version 6.14.0Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
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:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Uncontrolled Resource Consumption
EPSS
Base Score:
0.34