CVE-2026-45388: n/a
OCaml-TLS versions prior to 2.1.0 have a vulnerability in the client implementation where insufficient checks are performed on server certificates. This flaw allows an attacker to impersonate a server using certificates that lack proper KeyUsage and ExtendedKeyUsage attributes for server authentication.
AI Analysis
Technical Summary
The vulnerability in OCaml-TLS before version 2.1.0 arises because the client does not adequately verify that the server's certificate is intended for server authentication. Specifically, certificates missing the appropriate KeyUsage and ExtendedKeyUsage extensions can be accepted, enabling impersonation attacks. No CVSS score or patch information is currently available.
Potential Impact
An attacker can impersonate a legitimate server by presenting a certificate that is not authorized for server authentication, potentially leading to man-in-the-middle attacks or unauthorized access to sensitive data during TLS sessions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider avoiding vulnerable versions or applying any recommended workarounds from the vendor once published.
CVE-2026-45388: n/a
Description
OCaml-TLS versions prior to 2.1.0 have a vulnerability in the client implementation where insufficient checks are performed on server certificates. This flaw allows an attacker to impersonate a server using certificates that lack proper KeyUsage and ExtendedKeyUsage attributes for server authentication.
Affected software
pkg:golang/github.com/ocaml-tls/ocaml-tlsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in OCaml-TLS before version 2.1.0 arises because the client does not adequately verify that the server's certificate is intended for server authentication. Specifically, certificates missing the appropriate KeyUsage and ExtendedKeyUsage extensions can be accepted, enabling impersonation attacks. No CVSS score or patch information is currently available.
Potential Impact
An attacker can impersonate a legitimate server by presenting a certificate that is not authorized for server authentication, potentially leading to man-in-the-middle attacks or unauthorized access to sensitive data during TLS sessions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider avoiding vulnerable versions or applying any recommended workarounds from the vendor once published.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-05-12T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a3052db0b89be6888826f1b
Added to database: 6/15/2026, 7:30:35 PM
Last enriched: 6/15/2026, 8:02:09 PM
Last updated: 6/16/2026, 5:02:43 AM
Views: 7
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