Medium severity · published Oct 23, 2026
CVE-2026-55463
Goobi viewer: WebSocket endpoints lack server-side authentication and origin validation
New
6.5
CVSS
0.1%
EPSS
No
On KEV
Description
The Goobi viewer is a web application that allows digitised material to be displayed in a web browser. From version 4.11.0 to before version 26.05, several Jakarta WebSocket endpoints in goobi-viewer-core (DownloadTaskEndpoint, CampaignEndpoint, AutocompleteEndpoint, UserEndpoint) accept connections without verifying that the associated HttpSession belongs to a logged-in user, and none validate the Origin header against an allowlist. An unauthenticated attacker can therefore connect to these endpoints; through CampaignEndpoint this allows polluting the in-process crowdsourcing page-lock map and broadcasting forged lock messages, disrupting reviewers' work. This issue has been patched in version 26.05.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
goobi-viewer-core · intranda
>= 4.11.0, < 26.05 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55463
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55463
github.com
https://github.com/intranda/goobi-viewer-core/commit/8714ca81065d2c2c6e614a1ee6753de65cbe3412
github.com
https://github.com/intranda/goobi-viewer-core/releases/tag/v26.05
github.com
https://github.com/intranda/goobi-viewer-core/security/advisories/GHSA-h5m9-fpvw-qr36
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