Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion in inet_tls_dist

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CVE-2026-48860

CVE-2026-48860 affects Erlang/OTP’s TLS-based distribution via the inet_tls_dist.erl check_ip/1, which enforces a LAN allowlist, uses inet:sockname/1 (local address) instead of inet:peername/1, causing the peer’s subnet validation to be bypassed. Any holder of a CA-signed TLS certificate can bypa...

CVE-2026-48860 Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion in inet_tls_dist

Reliance on IP Address for Authentication vulnerability in Erlang/OTP ssl inettlsdist module allows unauthenticated bypass of the distribution-over-TLS LAN allowlist. The inettlsdist:checkip/1 function, which enforces a LAN allowlist for Erlang distribution over TLS, calls inet:sockname/1 instead...

CVE-2026-48860 Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion in inet_tls_dist

Reliance on IP Address for Authentication vulnerability in Erlang/OTP ssl inettlsdist module allows unauthenticated bypass of the distribution-over-TLS LAN allowlist. The inettlsdist:checkip/1 function, which enforces a LAN allowlist for Erlang distribution over TLS, calls inet:sockname/1 instead...