All vulnerabilities
CVE-2026-55459GHSA-7vrv-qh6g-gfx7

goobi-viewer-core: Goobi viewer: OpenID JWT audience not enforced by the verifier

intranda goobi-viewer-core
Open in ThreatlineRecord JSON
CVSS
7.4High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in26.05Fixed versionGitHub
Published23 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

  • 26.05io.goobi.viewer:viewer-core, mavenGitHub<dependency><groupId>io.goobi.viewer</groupId><artifactId>viewer-core</artifactId><version>26.05</version></dependency>

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • goobi-viewer-coreaffected: >= 25.01, < 26.05CVE List
  • io.goobi.viewer:viewer-core, maven>=25.01GitHub

References 3