CVE-2026-55486

Goobi viewer: IIIF Auth 2.0 origin parameter unsanitized — CSP malformation and reflected XSS

Published Oct 23, 2026 CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Intranda
Intranda goobi Viewer Core
Vendors & Products Intranda
Intranda goobi Viewer Core
Type Values Removed Values Added
Description 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.
Title Goobi viewer: IIIF Auth 2.0 origin parameter unsanitized — CSP malformation and reflected XSS
Weaknesses CWE-113
CWE-1336
CWE-79
References
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 30, 2026, 3:08 PM
Reserved
Jun 16, 2026, 10:28 PM
Status
Deferred
Published
Oct 23, 2026, 3:17 PM
Modified
Oct 30, 2026, 4:17 PM