CVE-2026-45388

9.1 criticalEPSS 0.2%

Critical (9.1). EPSS 0.2% chance of exploitation in the next 30 days.

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).

Severity

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/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 13% 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-2026-06
https://osv.dev/vulnerability/OSEC-2026-06

Check your stack JSON