CVE-2026-45389 | THREATINT

Description

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).

PUBLISHED Reserved 2026-05-12 | Published 2026-06-15 | Updated 2026-06-16 | Assigner mitre

References

osv.dev/vulnerability/OSEC-2026-07 exploit

osv.dev/vulnerability/OSEC-2026-07

cve.org (CVE-2026-45389)

nvd.nist.gov (CVE-2026-45389)

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