CVE-2026-89136
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 default and only enabled in --enable-rpk OR --enable-all OR --enable-distro AKA HAVE_RPK builds.
- Published Sep 27, 2026
- CVSS 8.3 high
- 0.6% chance of exploitation in the next 30 days (EPSS)
Affected software
In the news
- High-Severity Vulnerabilities Patched in OpenSSL, WolfSSL SecurityWeek ·