CVE-2026-6328 PUBLISHED

XQUIC Improper STREAM Frame Validation in Initial/Handshake Packets

Assigner: alibaba
Reserved: 15.04.2026 Published: 15.04.2026 Updated: 15.04.2026

Improper input validation, Improper verification of cryptographic signature vulnerability in XQUIC Project XQUIC xquic on Linux (QUIC protocol implementation, packet processing module, STREAM frame handler modules) allows Protocol Manipulation.This issue affects XQUIC: through 1.8.3.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 8.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	High	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	XQUIC Project
Product	XQUIC
Versions	Default: unaffected affected from 0 to 1.8.3 (incl.)

References

https://github.com/alibaba/xquic/commit/4764604a0e487eeb49338b4498aecda2194eae84

Problem Types

CWE-20 Improper input validation CWE
CWE-347 Improper verification of cryptographic signature CWE

Impacts

CAPEC-272 Protocol Manipulation