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CVE-2026-89136

Client accepts unsolicited RawPublicKey server certificate type

CVSS 4.0 8.3 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-89136

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-89136

Published

wolfSSL

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "wolfSSL",
                    "product": "wolfSSL",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "5.6.0",
                            "lessThanOrEqual": "5.9.2",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON