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CVE-2026-55486

9.3 critical Deferred
NVD · CVE.org

The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. From version 25.08 to before version 26.05, the IIIF Auth 2.0 endpoints auth/login and auth/token in AuthorizationFlowResource accept an origin query parameter without validation and then (1) embed it into the Content-Security-Policy: frame-ancestors response header and (2) embed it into an HTML response body as a JavaScript single-quoted postMessage argument. Because the attacker controls both the login and token calls that initiate the flow, the unescaped value yields reflected XSS. This issue has been patched in version 26.05.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 4

  1. StatusPublished → DeferredNVD modified 2026-10-23 16:28
  2. StatusReceived → PublishedNVD modified 2026-10-23 14:17
  3. StatusPublished → ReceivedNVD modified 2026-10-23 15:17
  4. First seenCVSS 9.3 · intrandaNVD modified 2026-10-23 14:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3