GO-2026-6090
Limit handshake messages we are willing to accept post-handshake in crypto/tls
At a glance
- Published
- Updated
- CVE
- CVE-2026-56862
- Aliases
- BIT-golang-2026-56862
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.
Affected packages
| Package | Versions |
|---|---|
| Go · stdlib | introduced 0, fixed 1.25.13, introduced 1.26.0-0, fixed 1.26.6, introduced 1.27.0-0, fixed 1.27.0-rc.3 |
References
- https://go.dev/issue/80528 REPORT
- https://go.dev/cl/804261 FIX
- https://groups.google.com/g/golang-announce/c/94pEornpRlI WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |