Vulnerability Description
The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. From version 25.01 to before version 26.05, AuthenticationEndpoint.verifyOpenIdToken builds its verifier as JWT.require(algorithm).withIssuer(issuer).build() and does not enforce the aud claim during cryptographic validation. The aud check is performed manually afterwards via a single string-equality call, which only handles single-string aud values. In a multi-RP IdP setup, a token whose single-string aud matches the viewer's client ID but was issued for a different relying party passes the check and authenticates the attacker as the token's sub. This issue has been patched in version 26.05.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/intranda/goobi-viewer-core/commit/73e2ccb63c36392d46f8d216445
- https://github.com/intranda/goobi-viewer-core/releases/tag/v26.05
- https://github.com/intranda/goobi-viewer-core/security/advisories/GHSA-7vrv-qh6g
FAQ
What is CVE-2026-55459?
CVE-2026-55459 is a vulnerability with a CVSS score of 7.4 (HIGH). The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. From version 25.01 to before version 26.05, AuthenticationEndpoint.verifyOpenIdToken builds its v...
How severe is CVE-2026-55459?
CVE-2026-55459 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55459?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.