CVE-2026-89136
High
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.
SeverityHigh
CVSS8.3
Exploit probability—
ProductwolfSSL
PublishedSep 27, 2026
First seenSep 27, 2026
Weakness typeCWE-287Improper authentication
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wolfSSL wolfSSL | 5.6.0 ≤ v ≤ 5.9.2 | — |
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