CVE-2026-5263
Medium
Description
URI nameConstraints from constrained intermediate CAs are parsed but not enforced during certificate chain verification in wolfcrypt/src/asn.c. A compromised or malicious sub-CA could issue leaf certificates with URI SAN entries that violate the nameConstraints of the issuing CA, and wolfSSL would accept them as valid.
SeverityMedium
CVSS6.5
Exploit probability—
ProductWolfssl
PublishedApr 9, 2026
First seenApr 9, 2026
Weakness typeCWE-295CWE-295
How to fix
Update
- wolfssl wolfssl5.9.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| wolfssl wolfssl | v < 5.9.1 | 5.9.1 |
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