SB2026062314 - Resource exhaustion in PyPDF
Published: June 23, 2026
Security Bulletin ID
SB2026062314
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: N/A)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 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/E:U/U:Green
The vulnerability allows a remote attacker to cause excessive memory consumption.
The vulnerability exists due to uncontrolled resource consumption in content stream parsing when processing a PDF content stream without a /Length value. A remote attacker can supply a specially crafted PDF to cause excessive memory consumption.
The issue occurs because MAX_DECLARED_STREAM_LENGTH is sometimes ignored.
Remediation
Install update from vendor's website.