SB2026022313 - Denial of service in PyPDF
Published: February 23, 2026
Security Bulletin ID
SB2026022313
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 security vulnerability.
1) Infinite loop (CVE-ID: N/A)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop when loading circular /Prev entries in cross-reference streams. A remote attacker can trick a victim to open a specially crafted PDF and cause denial of service conditions.
Remediation
Install update from vendor's website.