CVE-2026-45389

7.4 highEPSS 0.2%

High (7.4). EPSS 0.2% chance of exploitation in the next 30 days.

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).

Severity

CVSS 3.1

7.4 high

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-31)
CWE: CWE-295
Published: 2026-06-15
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://osv.dev/vulnerability/OSEC-2026-07

Check your stack JSON