CVE Tools
Sign in

CVE-2025-64702

quic-go HTTP/3 QPACK Header Expansion DoS

Published: Dec 11, 2025Updated: Feb 17, 2026 Sources: CVE List NVD GHSACWE-770
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.3%
Top 75.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-770

Affected Products

quic-goquic-go project
Library
OSS Libraries / go
quic-goquic-go
Library
OSS Libraries / generic-library
github.com/quic-go/quic-goGoOSS Libraries
quic-go projectoss-projectOSS Librariesaka quic-go
quic-gooss-projectOSS Librariesaka quic-go
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/quic-go/quic-go/commit/5b2d2129f8315da41e01eff0a847ab38a34e83a8
github.com
https://github.com/quic-go/quic-go/security/advisories/GHSA-g754-hx8w-x2g6
github.com
https://nvd.nist.gov/vuln/detail/CVE-2025-64702
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Dec 11, 2025
Last Updated
Feb 17, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-64702 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows