SB2026080777 - Resource exhaustion in PyPDF
Published: August 7, 2026
Security Bulletin ID
SB2026080777
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2026-59936)
CWE-ID: CWE-400 - Resource exhaustion
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 uncontrolled resource consumption in the page content stream parser when parsing a page content stream containing a non-terminated inline image. A remote attacker can supply a crafted PDF to cause a denial of service.
The issue is triggered when processing page content streams, such as during text extraction.
Remediation
Install update from vendor's website.