Origin Validation Error Affecting io.unitycatalog:unitycatalog-server package, versions [,0.4.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-IOUNITYCATALOG-15682060
- published18 Mar 2026
- disclosed11 Mar 2026
- creditLukas Reining
Introduced: 11 Mar 2026
CVE-2026-27478 (opens in a new tab)How to fix?
Upgrade io.unitycatalog:unitycatalog-server to version 0.4.1 or higher.
Overview
Affected versions of this package are vulnerable to Origin Validation Error in the token exchange endpoint (/api/1.0/unity-control/auth/tokens) that processes JWTs. An attacker can gain unauthorized access and impersonate any user by supplying a JWT with a malicious issuer, as the endpoint fetches the JWKS endpoint for signature validation based solely on the unvalidated issuer claim.