What is CVE-2026-45388?

CVE-2026-45388 is a critical-severity vulnerability in N/a, classified under Improper Certificate Validation. CVSS score: 9.1/10. Published 2026-06-15.

How severe is CVE-2026-45388?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in N/a

CVE-2026-45388

In OCaml-TLS before 2.1.0, the client implementation does insufficient checks of the certificate provided by the server, which allows impersonation with certificates that are not meant for server authentication (because of KeyUsage and Ext…

Vulnerability class: Improper Certificate Validation

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.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

cve@mitre.org

Frequently asked questions

What is CVE-2026-45388?: CVE-2026-45388 is a critical-severity vulnerability in N/a, classified under Improper Certificate Validation. CVSS score: 9.1/10. Published 2026-06-15.
How severe is CVE-2026-45388?: Critical severity. CVSS v3 base score is 9.1 out of 10.