GO-2026-4870
Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls
At a glance
- Published
- Updated
- CVE
- CVE-2026-32283
- Aliases
- BIT-golang-2026-32283
Description
If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.
Affected packages
| Package | Versions |
|---|---|
| Go · stdlib | introduced 0, fixed 1.25.9, introduced 1.26.0-0, fixed 1.26.2 |
References
- https://go.dev/cl/763767 FIX
- https://go.dev/issue/78334 REPORT
- https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |