CVE-2026-56862
N/A
N/A
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Go standard library | crypto/tls | 0 < 1.25.13 | affected |
| Go standard library | crypto/tls | 1.26.0-0 < 1.26.6 | affected |
| Go standard library | crypto/tls | 1.27.0-0 < 1.27.0-rc.3 | affected |
Weaknesses
- CWE-770: Allocation of Resources Without Limits or Throttling
References
- https://go.dev/issue/80528
- https://go.dev/cl/804261
- https://groups.google.com/g/golang-announce/c/94pEornpRlI
- https://pkg.go.dev/vuln/GO-2026-6090
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