EEF-CVE-2026-58227 TLS/DTLS denial of service via unbounded recursion on cross-signed peer certificate chain

Summary The Erlang/OTP ssl application does not detect cycles when reconstructing an incomplete peer certificate chain during a TLS or DTLS handshake. In ssl\certificate:handle\incomplete\chain/5, the received chain is passed to ssl\certificate:build\certificate\chain/5, which walks issuer...

CVE-2026-58227

CVE-2026-58227 : In Erlang/OTP, the ssl certificate chain reconstruction during TLS/DTLS handshakes can fail to detect cycles, causing unbounded recursion when peers supply cross-signed chains (A→B and B→A). The missing cycle detection and depth limit in ssl_certificate:build_certificate_chain/5 ...

Sslmerge - Tool To Help You Build A Valid SSL Certificate Chain From The Root Certificate To The End-User Certificate

Is an open source tool to help you build a valid SSL certificate chain from the root certificate to the end-user certificate. Also can help you fix the incomplete certificate chain and download all missing CA certificates. How To Use It's simple: Clone this repository git clone...