SB20260425209 - Allocation of Resources Without Limits or Throttling in quic-go
Published: April 25, 2026
Security Bulletin ID
SB20260425209
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) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2025-64702)
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the HTTP/3 QPACK header decoding and header construction logic when processing a QPACK-encoded HEADERS frame that expands into a large decoded header field section. A remote attacker can send a specially crafted HEADERS frame to cause a denial of service.
The issue affects both HTTP/3 client and server implementations due to symmetric header construction.
Remediation
Install update from vendor's website.