SB20260410100 - XML Entity Expansion in PyPDF
Published: April 10, 2026
Security Bulletin ID
SB20260410100
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) XML Entity Expansion (CVE-ID: N/A)
The vulnerability allows a remote attacker to cause excessive memory consumption.
The vulnerability exists due to improper restriction of recursive entity references in DTDs in the XMP metadata parser when parsing XMP metadata from a PDF file. A remote attacker can supply a specially crafted PDF to cause excessive memory consumption.
Exploitation requires the application to parse the XMP metadata.
Remediation
Install update from vendor's website.