Resource exhaustion in Quic-go

CVE-2026-40898

quic-go is an implementation of the QUIC protocol in Go. Prior to version 0.59.1, an attacker can cause excessive memory allocation in quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-40898?
CVE-2026-40898 is a medium-severity vulnerability in Quic-go, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-06-04.
How severe is CVE-2026-40898?
Medium severity. CVSS v3 base score is 5.3 out of 10.