CVE-2026-55486

CRITICAL 9.3

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

CVSS Score

9.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79 CWE-113 CWE-1336
Vendor	intranda
Product	goobi-viewer-core
Published	Oct 23, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

intranda / goobi-viewer-core

>= 25.08, < 26.05

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/intranda/goobi-viewer-core/security/advisories/GHSA-975w-g9gj-xq48 github.com: https://github.com/intranda/goobi-viewer-core/commit/0e488c6b02a28c1d1a747dfe3958ad2bbcff2d0b github.com: https://github.com/intranda/goobi-viewer-core/releases/tag/v26.05