{"id":"CVE-2026-89136","title":"When using RPK (Raw Public Key), the client side of a TLS 1.2, 1.3 and DTLS 1.2 connection could accept an unsolicited server_cert_type=RawPublicKey which allowed a malicious or misbehaving server to bypass authentication","summary":"When using RPK (Raw Public Key), the client side of a TLS 1.2, 1.3 and DTLS 1.2 connection could accept an unsolicited server_cert_type=RawPublicKey which allowed a malicious or misbehaving server to bypass authentication. RPK is off by …","severity":"high","cvss":8.3,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-287"],"vendor":"wolfSSL","product":"wolfSSL","affected":["wolfSSL >= 5.6.0 <= 5.9.2"],"published":"2026-09-27","updated":"2026-09-27","sourceUpdated":"2026-09-27T10:16:59.287","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89136","references":[{"url":"https://github.com/wolfSSL/wolfssl/pull/11009","label":"facts@wolfssl.com"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-27T09:45:46.032Z","slug":"CVE-2026-89136","body":"## Overview\n\nWhen using RPK (Raw Public Key), the client side of a TLS 1.2, 1.3 and DTLS 1.2 connection could accept an unsolicited server_cert_type=RawPublicKey which allowed a malicious or misbehaving server to bypass authentication. RPK is off by default and only enabled in --enable-rpk OR --enable-all OR --enable-distro AKA HAVE_RPK builds.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":45.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}