Vulnerability DatabaseCVE-2026-89136
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CVE-2026-89136
Published:September 27, 2026
Updated:October 10, 2026
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.
Affected Packages
https://github.com/wolfSSL/wolfssl.git (GITHUB):
Affected version(s) >=v5.6.4-stable <v5.9.4-stable
Fix Suggestion:
Update to version v5.9.4-stable
Related Resources (3)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89136.json
https://nvd.nist.gov/vuln/detail/CVE-2026-89136
https://github.com/wolfSSL/wolfssl/pull/11009
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CVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Authentication
CWE-287
EPSS
Base Score:
0.55