SB20260816532 - Infinite loop in PyPDF

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Main Vulnerability Database SB20260816532

SB20260816532 - Infinite loop in PyPDF

Published: August 16, 2026

Security Bulletin ID SB20260816532
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Infinite loop (CVE-ID: N/A)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to loop with an unreachable exit condition in TreeObject.insert_child when processing a crafted PDF through a code path that invokes the function. A remote attacker can supply a specially crafted PDF to cause a denial of service.

Exploitation requires an application code path that uses TreeObject.insert_child, typically during PDF-writing operations.


Remediation

Install update from vendor's website.

References