All vulnerabilities
CVE-2026-89136

wolfSSL: Client accepts unsolicited RawPublicKey server certificate type

wolfSSL wolfSSL
Open in ThreatlineRecord JSON
CVSS
8.3High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.55%Chance of exploitation activity in the next 30 days, higher than 45% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
Published27 Sep 2026Updated 29 Sep 2026CVE List

What fixes it

No source in this snapshot names a fixed version.

Description

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.

Text from CVE List

Affected versions 1

  • wolfSSLaffected: 5.6.0 through 5.9.2CVE List

References 1