CVE-2026-45389
Last modified
CVE-2026-45389 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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).. EPSS estimates a 0.19% chance of exploitation in the next 30 days.
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).
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-45389?
How severe is CVE-2026-45389?
How do I fix CVE-2026-45389?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-45383libde265 is an open source implementation of the h.265 video…6.9
- CVE-2026-45384bit7z is a cross-platform C++ static library that allows the…6.1
- CVE-2026-45385Open WebUI is a self-hosted artificial intelligence platform…4.3
- CVE-2026-45386Open WebUI is a self-hosted artificial intelligence platform…4.3
- CVE-2026-45387Open WebUI is a self-hosted artificial intelligence platform…4.3
- CVE-2026-45388In OCaml-TLS before 2.1.0, the client implementation does in…9.1
- CVE-2026-4539A security flaw has been discovered in pygments up to 2.19.2…3.3
- CVE-2026-45390In OCaml-tar before 3.4.0, a crafted archive with ../ path s…9.1
- CVE-2026-45391A command injection vulnerability in Cribl Edge for Linux ve…8.5
- CVE-2026-45392DOM-based cross-site scripting (XSS) in Cribl Stream before …8.7
- CVE-2026-45393A vulnerability chain in Cribl Edge for Windows before 4.17.…8.5
- CVE-2026-45395Open WebUI is a self-hosted artificial intelligence platform…7.2
Are you affected by CVE-2026-45389?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST