Allocation of Resources Without Limits or Throttling in quic-go - CVE-2025-64702
Published: April 25, 2026
Vulnerability identifier: #VU127915
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-64702
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: quic-go
Affected software:
quic-go
quic-go
Detailed vulnerability description
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.
How to mitigate CVE-2025-64702
Install security update from vendor's website.