CVE-2026-6328

Name: CVE-2026-6328
Creator: NVD / NIST
Published: 2026-04-15T04:17:48.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.3/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2026-6328 is a high-severity vulnerability rated 8.3/10 on the CVSS scale. 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.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 4.0

8.3/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.20%

9.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

References

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

Timeline

Published: Apr 15, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-6328?

How severe is CVE-2026-6328?

CVE-2026-6328 has a CVSS score of 8.3/10 (HIGH severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-6328?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-6328?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST