CVE-2026-55960

Un-negotiated Raw Public Key (RFC 7250) accepted in place of an X.509 certificate, bypassing chain validation. A raw public key has no chain, so ParseCertRelative() accepts it without performing any trust verification; it must therefore only be accepted when RPK was actually negotiated for that peer. The check now defaults the expected type to X.509 (per RFC 7250/8446) when no type was negotiated, comparing against the received server certificate type on the client and the selected client certificate type on the server, and rejects any mismatch, including an un-negotiated raw public key, with UNSUPPORTEDCERTIFICATE. Only affects builds with Raw Public Key support (HAVERPK) enabled - disabled by default in a standalone build, but included in --enable-all.

Database specific

{
    "cwe_ids": [
        "CWE-295"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55960.json",
    "cna_assigner": "wolfSSL"
}

References

Affected packages

Git / github.com/wolfssl/wolfssl

Affected ranges

Type

GIT

Repo

https://github.com/wolfssl/wolfssl

Events

Introduced

37884f864d6fd9b04f44677cb04da15d0c9d6526

Fixed

ac01707f552c611fbd135cc723b2682b3e7f80f2

Database specific

{
    "cpe": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.6.4"
        },
        {
            "last_affected": "5.9.1"
        },
        {
            "fixed": "5.9.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

v5.*

v5.2.1

v5.6.4-stable

v5.6.6-stable

v5.7.0-stable

v5.7.2-stable

v5.7.4-stable

v5.7.6-stable

v5.8.0-stable

v5.8.2-stable

v5.8.4-stable

v5.9.0-stable

v5.9.1-stable

Other

wolfEntropy1

wolfEntropy2d

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55960.json"