CVE-2026-9648
CVE-2026-9648
- State
- Published
- Severity
- 9.1 Critical
- Published
- Jun 11, 2026
- Updated
- Jun 11, 2026
- Reserved
- May 26, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | CISA-ADP |
Weaknesses
The record names no weakness.
Affected Products
| Product | Versions |
|---|---|
crypton-certificateHaskell Programming Language |
|
References
- https://github.com/kazu-yamamoto/crypton-certificate/pull/30
- https://github.com/kazu-yamamoto/crypton-certificate/pull/30/changes/f4b77edf6ead77f4a886da40e41eab20f0180e39
- https://hackage.haskell.org/package/crypton-x509-validation-1.9.1/revisions/
- https://github.com/haskell/security-advisories/pull/332
- https://www.kb.cert.org/vuls/id/862559
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.