CVE-2026-6328

8.3 highEPSS 0.2%

High (8.3). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.3 high

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-31)
CWEs: CWE-20, CWE-347
Published: 2026-04-15
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

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

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