VDB
CVE-2026-9648
CVE-2026-9648
PUBLISHED
CVSS 9.1 CRITICAL
Reported by certcc · Published June 11, 2026
The crypton-x509-validation Haskell library fails to enforce X.509 NameConstraints, allowing TLS clients to accept certificates whose Subject Alternative Names fall outside the issuing CA’s permitted subtrees. This oversight enables an attacker who compromises a name-constrained sub-CA to impersonate domains beyond its intended scope.
Risk Scores
CVSS 3.1
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haskell Programming Language | crypton-certificate | 0 |
| Haskell Programming Language | crypton-certificate | 0 |
Timeline
- Jun 6, 2026 CVE Published
- Jun 6, 2026 Security Advisory
- Jun 12, 2026 Security Advisory