CVE-2026-45388

CRITICAL EPSS 13.0%

Published Jun 15, 20262w ago · Modified Jun 17, 20262w ago

9.1 CVSS 3.1

Critical

Published Jun 15, 2026 2w ago

Last Modified Jun 17, 2026 2w ago

Description

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 ExtendedKeyUsage).

CVSS Details

Base Score

9.1

Exploitability

3.9

Impact

5.2

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability None

Threat Intelligence

EPSS Exploit Probability

13.0% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-295

References 1

osv.dev https://osv.dev/vulnerability/OSEC-2026-06

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.