medium6.5
CVE-2026-5263
URI nameConstraints from constrained intermediate CAs are parsed but not enforced during certificate chain verification in wolfcrypt/src/asn.c.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Wolfssl | Wolfssl | before 5.9.1 |