SB2026041097 - Resource exhaustion in PyPDF
Published: April 10, 2026
Security Bulletin ID
SB2026041097
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) Resource exhaustion (CVE-ID: CVE-2026-27888)
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the xfa property processing when accessing a compressed XFA stream using /FlateDecode. A remote attacker can supply a crafted PDF to cause a denial of service.
Exploitation requires the application to access the xfa property of a reader or writer.
Remediation
Install update from vendor's website.