Vulnerability · Published Apr 15, 2026 · Assigned by alibaba
CVE-2026-6328XQUIC Improper STREAM Frame Validation in Initial/Handshake Packets
High 8.3
In plain English
A high-severity improper input validation in XQUIC from XQUIC Project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 4.0)8.3High
Exploit odds (30 days)0.2%top 90.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| XQUIC Project | XQUIC | 0 – through 1.8.3 |
Weakness: CWE-20, CWE-347 · 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