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CVE-2026-12064

When a user invokes curl using a schemeless URL combined with `--proto-default` sftp (or scp), a disconnect occurs between the tool layer and libcurl. The tool layer incorrectly infers the URL scheme, which erroneously bypasses the initialization of critical SSH security options like CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256 and CURLOPT_SSH_KNOWNHOSTS. Conversely, the libcurl runtime successfully honors CURLOPT_DEFAULT_PROTOCOL and establishes the connection via SFTP/SCP as specified. Because the tool
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5486c43515945901ea3bb93d064b3d6a5b6a653ff91777da3104a13da1b1b497
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"curl","vendor":"curl","versions":[{"lessThanOrEqual":"8.20.0","status":"affected","version":"8.20.0","versionType":"semver"},{"lessThanOrEqual":"8.19.0","status":"affected","version":"8.19.0","versionType":"semver"},{"lessThanOrEqual":"8.18.0","status":"affected","version":"8.18.0","versionType":"semver"},{"lessThanOrEqual":"8.17.0","status":"affected","version":"8.17.0","versionType":"semver"},{"lessThanOrEqual":"8.16.0","status":"affected","version":"8.16.0","versionType":"semver"},{"lessThanOrEqual":"8.15.0","status":"affected","version":"8.15.0","ve…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a2895d02d18b7e5dad13157c8781ff39191e27da4728fd5099b3c0819ffec91e · sha256:f1ba680ca91312c7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a2895d02d18b7e5dad13157c8781ff39191e27da4728fd5099b3c0819ffec91e · sha256:f1ba680ca91312c7… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"description":"CWE-297 Improper Validation of Certificate with Host Mismatch","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a2895d02d18b7e5dad13157c8781ff39191e27da4728fd5099b3c0819ffec91e · sha256:f1ba680ca91312c7… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"www","url":"https://curl.se/docs/CVE-2026-12064.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2895d02d18b7e5dad13157c8781ff39191e27da4728fd5099b3c0819ffec91e · sha256:f1ba680ca91312c7… · /containers/cna/references/1
{"name":"json","url":"https://curl.se/docs/CVE-2026-12064.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2895d02d18b7e5dad13157c8781ff39191e27da4728fd5099b3c0819ffec91e · sha256:f1ba680ca91312c7… · /containers/cna/references/0
{"name":"issue","url":"https://hackerone.com/reports/3797526"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2895d02d18b7e5dad13157c8781ff39191e27da4728fd5099b3c0819ffec91e · sha256:f1ba680ca91312c7… · /containers/cna/references/2
{"tags":["exploit"],"url":"https://hackerone.com/reports/3797526"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a2895d02d18b7e5dad13157c8781ff39191e27da4728fd5099b3c0819ffec91e · sha256:f1ba680ca91312c7… · /containers/adp/0/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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