Vulnerability Report: GO-2026-6090
- CVE-2026-56862
- Affects: crypto/tls
- Published: Aug 13, 2026
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.
Affected Packages
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PathVersionsSymbols
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before go1.25.13, from go1.26.0-0 before go1.26.6, from go1.27.0-0 before go1.27.0-rc.3
Aliases
References
- https://go.dev/issue/80528
- https://go.dev/cl/804261
- https://groups.google.com/g/golang-announce/c/94pEornpRlI
- https://vuln.go.dev/ID/GO-2026-6090.json
Credits
- Qi Deng of Aurascape.ai
Feedback
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