CVE-2026-9648
CVE-2026-9648
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 att…
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
References
Frequently asked questions
- What is CVE-2026-9648?
- CVE-2026-9648 is a critical-severity vulnerability. CVSS score: 9.1/10. Published 2026-06-11.
- How severe is CVE-2026-9648?
- Critical severity. CVSS v3 base score is 9.1 out of 10.