The Erlang/OTP ssl TLS 1.2 (and earlier) and DTLS client does not verify that the cipher suite selected by the server in ServerHello was among the suites offered by the client in ClientHello. The cli…
Summary
The Erlang/OTP ssl TLS 1.2 (and earlier) and DTLS client does not verify that the cipher suite selected by the server in ServerHello was among the suites offered by the client in ClientHello. The client-side tls_handshake:hello/5 handler validates the negotiated protocol version and the downgrade sentinel but hands the server-chosen suite directly to ssl_handshake:handle_server_hello_extensions/9, which installs it without a membership check. The TLS 1.3 client path performs this check (per RFC…
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Lint boundary warnings (1)
The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).
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REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://www.erlang.org/doc/system/versions.html#order-of-versions
Sources
- NVD DATABASE
Original Links
- https://cna.erlef.org/cves/CVE-2026-55953.html
- https://github.com/erlang/otp/commit/064e236414614f9085cbbbd6eacf0e43c02d1b4b
- https://github.com/erlang/otp/commit/0a82596d425abe43dc2e0b3d74aa1557ef74051c
- https://github.com/erlang/otp/commit/e6ff938116b2872bccc478af7fefb56627285b77
- https://github.com/erlang/otp/security/advisories/GHSA-c6cw-pr89-w882
- https://osv.dev/vulnerability/EEF-CVE-2026-55953
- https://www.erlang.org/doc/system/versions.html#order-of-versions
Timeline
- nvd_ingest NVD