CVE-2026-55459 Goobi viewer: OpenID JWT audience not enforced by the verifier
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-55459?
CVE-2026-55459 is a high-severity vulnerability in intranda goobi-viewer-core, published on 23 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-55459?
How do I fix CVE-2026-55459?
No fix has been published for CVE-2026-55459 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-55459 being exploited?
There is no known exploitation of CVE-2026-55459 in the wild and no public exploit code.
Sources
Also known as GHSA-7vrv-qh6g-gfx7.