Vulnerability Description
quic-go is an implementation of the QUIC protocol in Go. Versions 0.56.0 and below are vulnerable to excessive memory allocation through quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes into a large header field section (many unique header names and/or large values). The implementation builds an http.Header (used on the http.Request and http.Response, respectively), while only enforcing limits on the size of the (QPACK-compressed) HEADERS frame, but not on the decoded header, leading to memory exhaustion. This issue is fixed in version 0.57.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Quic-Go Project | Quic-Go | < 0.57.0 |
Related Weaknesses (CWE)
References
- https://github.com/quic-go/quic-go/commit/5b2d2129f8315da41e01eff0a847ab38a34e83Patch
- https://github.com/quic-go/quic-go/security/advisories/GHSA-g754-hx8w-x2g6Vendor Advisory
FAQ
What is CVE-2025-64702?
CVE-2025-64702 is a vulnerability with a CVSS score of 5.3 (MEDIUM). quic-go is an implementation of the QUIC protocol in Go. Versions 0.56.0 and below are vulnerable to excessive memory allocation through quic-go's HTTP/3 client and server implementations by sending a...
How severe is CVE-2025-64702?
CVE-2025-64702 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-64702?
Check the references section above for vendor advisories and patch information. Affected products include: Quic-Go Project Quic-Go.