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CVE-2026-27478

Unity Catalog is an open, multi-modal Catalog for data and AI. In 0.4.0 and earlier, a critical authentication bypass vulnerability exists in the Unity Catalog token exchange endpoint (/api/1.0/unity-control/auth/tokens). The endpoint extracts the issuer (iss) claim from incoming JWTs and uses it to dynamically fetch the JWKS endpoint for signature validation without validating that the issuer is a trusted identity provider.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:36cabffc9a53591d9ab8b38b2e383a4777c0136915082dd8e269235d02982807
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-1390","description":"CWE-1390: Weak Authentication","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /containers/cna/problemTypes/2/descriptions/0

Affected products and versions

1 source assertion
{"product":"unitycatalog","vendor":"unitycatalog","versions":[{"status":"affected","version":"<= 0.4.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/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:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-1390","description":"CWE-1390: Weak Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /containers/cna/problemTypes/2/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/unitycatalog/unitycatalog/security/advisories/GHSA-qqcj-rghw-829x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/unitycatalog/unitycatalog/security/advisories/GHSA-qqcj-rghw-829x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e635eb8ace4d81e921c8686264ce765eeea7f4b65ef8e55d042cbb204627d79 · sha256:c8cac4e7be67a593… · /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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