CVE-2026-6328

XQUIC Improper STREAM Frame Validation in Initial/Handshake Packets

HIGH
8.3
CVSS Score
Published: April 15, 2026 at 03:18 AM UTC
Updated: June 17, 2026 at 11:00 AM UTC
1 product affected across 1 vendorXQUIC

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Severity
HIGH8.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1.8.3

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.3HIGHalibaba
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-20CWE-347

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