Vulnerability Description
Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://go.dev/cl/804261
- https://go.dev/issue/80528
- https://groups.google.com/g/golang-announce/c/94pEornpRlI
- https://pkg.go.dev/vuln/GO-2026-6090
FAQ
What is CVE-2026-56862?
CVE-2026-56862 is a vulnerability with a CVSS score of 7.5 (HIGH). Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate...
How severe is CVE-2026-56862?
CVE-2026-56862 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56862?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.