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
- Quic-go — versions < 0.59.1
- Quic-go_project Quic-go
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
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.