Vulnerability DatabaseCVE-2026-45389
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CVE-2026-45389
Published:June 15, 2026
Updated:June 29, 2026
In OCaml-TLS before 2.1.0, the server implementation does insufficient checks of the certificate provided by the client (when doing client authentication), which allows impersonation with certificates that are not meant for client authentication (because of KeyUsage and ExtendedKeyUsage).
Affected Packages
https://github.com/mirleft/ocaml-tls.git (GITHUB):
Affected version(s) >=v0.10.5 <v2.1.0
Fix Suggestion:
Update to version v2.1.0
Related Resources (1)
https://osv.dev/vulnerability/OSEC-2026-07
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CVSS v4
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Certificate Validation
CWE-295
EPSS
Base Score:
0.19