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).
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | n/a | affected |
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Project Subscriptions
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Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
| Link | Providers |
|---|---|
| https://osv.dev/vulnerability/OSEC-2026-07 |
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History
Mon, 15 Jun 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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). | |
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-06-15T18:52:19.110Z
Reserved: 2026-05-12T00:00:00.000Z
Link: CVE-2026-45389
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-06-15T20:16:28.470
Modified: 2026-06-15T20:16:28.470
Link: CVE-2026-45389
Redhat
No data.
OpenCVE Enrichment
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Weaknesses
No weakness.