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GO-2026-4870
Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls
Quick fix
GO-2026-4870 — stdlib: upgrade to the fixed version with the command below.
go get stdlib@v1.25.9Details
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.
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