SB2026080778 - Infinite loop in PyPDF

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Main Vulnerability Database SB2026080778

SB2026080778 - Infinite loop in PyPDF

Published: August 7, 2026

Security Bulletin ID SB2026080778
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: CVE-2026-59935)

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

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/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 a loop with an unreachable exit condition in the inline image parser for ASCII85 and ASCIIHex filters when parsing the content stream of a page containing a not terminated inline image. A remote attacker can supply a crafted PDF file to cause a denial of service.

This issue is triggered when processing page content streams, such as during text extraction.


Remediation

Install update from vendor's website.

References