undici vulnerable to Denial of Service via TLS 1.2 certificate-changing renegotiation

影響: npm:undici >= 4.2.1, < 6.29.1 → 6.29.1, npm:undici >= 7.0.0, < 7.30.1 → 7.30.1, npm:undici >= 8.0.0, < 8.12.2 → 8.12.2

undici crashes the client process when a TLS 1.2 server renegotiates after the connection is established and presents a different, CA-trusted certificate whose hostname does not match the requested host. Node.js re-runs hostname verification on the renegotiated handshake and destroys the socket with ERR_TLS_CERT_ALTNAME_INVALID. undici's established socket error handler asserted that this error code could never occur, so the peer-controlled error became an uncaught AssertionError that terminate…

Read on GitHub Advisory Database

On 10/28/2026, 04:02 AM, GitHub Advisory Database published "undici vulnerable to Denial of Service via TLS 1.2 certificate-changing renegotiation" (type: Advisory). Severity is "High" (high). Related technologies: JavaScript / Node.js. CVE: CVE-2026-87018.