A certificate with no dNSName SAN but another SAN type present (e.g. registeredID or iPAddress) bypassed the Subject CN dNSName name-constraint check. The CN-as-DNS fallback was gated on cert->subjectCN != NULL && cert->altNames == NULL && !cert->isCA instead of "no dNSName SAN", so an out-of-scope CN was accepted. This incomplete fix from CVE-2026-6731, leading to the name-constraint check issue, was introduced in wolfSSL version 5.9.2.
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://github.com/wolfSSL/wolfssl/pull/10837 |
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History
Fri, 02 Oct 2026 19:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| CPEs | cpe:2.3:a:wolfssl:wolfssl:5.9.2:*:*:*:*:*:*:* | |
| Metrics |
cvssV3_1
|
Tue, 29 Sep 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Sun, 27 Sep 2026 10:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Wolfssl
Wolfssl wolfssl |
|
| Vendors & Products |
Wolfssl
Wolfssl wolfssl |
Sun, 27 Sep 2026 09:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A certificate with no dNSName SAN but another SAN type present (e.g. registeredID or iPAddress) bypassed the Subject CN dNSName name-constraint check. The CN-as-DNS fallback was gated on cert->subjectCN != NULL && cert->altNames == NULL && !cert->isCA instead of "no dNSName SAN", so an out-of-scope CN was accepted. This incomplete fix from CVE-2026-6731, leading to the name-constraint check issue, was introduced in wolfSSL version 5.9.2. | |
| Title | Subject CN name-constraint check bypassed when non-DNS SAN present | |
| Weaknesses | CWE-295 | |
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: wolfSSL
Published: 2026-09-27T09:16:58.067Z
Updated: 2026-09-29T16:37:26.748Z
Reserved: 2026-09-10T22:37:22.616Z
Link: CVE-2026-89134
Updated: 2026-09-29T16:36:18.487Z
Status : Analyzed
Published: 2026-09-27T10:16:59.030
Modified: 2026-10-02T18:57:50.840
Link: CVE-2026-89134
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