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CVE-2026-45389

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).
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4a0bec66d5f243e39762181cbbd8e11764fc049563871ae4e16207b9a31872e6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6022123f16664df695ea3d4e69890fa005cc98dd7418788f6de300285a4192ab · sha256:a3e280eda4f1730a… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-295","description":"CWE-295 Improper Certificate Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6022123f16664df695ea3d4e69890fa005cc98dd7418788f6de300285a4192ab · sha256:a3e280eda4f1730a… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6022123f16664df695ea3d4e69890fa005cc98dd7418788f6de300285a4192ab · sha256:a3e280eda4f1730a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6022123f16664df695ea3d4e69890fa005cc98dd7418788f6de300285a4192ab · sha256:a3e280eda4f1730a… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6022123f16664df695ea3d4e69890fa005cc98dd7418788f6de300285a4192ab · sha256:a3e280eda4f1730a… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-295","description":"CWE-295 Improper Certificate Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6022123f16664df695ea3d4e69890fa005cc98dd7418788f6de300285a4192ab · sha256:a3e280eda4f1730a… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://osv.dev/vulnerability/OSEC-2026-07"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6022123f16664df695ea3d4e69890fa005cc98dd7418788f6de300285a4192ab · sha256:a3e280eda4f1730a… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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