Vulnerability details
CVE-2026-89136
wolfSSL wolfSSL
Client accepts unsolicited RawPublicKey server certificate type
CVSS 4.0
8.3High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.3High | 4.0 | CVEProject cvelistV5 (CNA) (wolfSSL) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| wolfSSL | wolfSSL | 5.6.0 ≤ v ≤ 5.9.2 | CVEProject cvelistV5 (CNA) |
References and advisories
1
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Details
- Published
- 2026-09-27
- Last updated
- 2026-09-29
- State
- Published
- Assigner (CNA)
- wolfSSL
Exploit prediction (EPSS)
0.38%
Probability of exploitation in 30 days
32.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-287Improper Authentication