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).
References
History

Mon, 15 Jun 2026 19:30:00 +0000

Type Values Removed Values Added
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).
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-15T18:52:25.782Z

Reserved: 2026-05-12T00:00:00.000Z

Link: CVE-2026-45388

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-06-15T20:16:28.350

Modified: 2026-06-15T20:16:28.350

Link: CVE-2026-45388

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.