CVE-2026-40104: XWiki

High severity, CVSS 8.2. EPSS: 0.7% chance of exploitation in the next 30 days.

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Versions 1.8-rc-1, 17.0.0-rc-1 and 17.5.0-rc-1 and prior include a resource exhaustion vulnerability in REST API endpoints such as /xwiki/rest/wikis/xwiki/spaces/AnnotationCode/pages/AnnotationConfig/objects/AnnotationCode.AnnotationConfig/0/properties, which list all available pages as part of the metadata for database list properties without applying query limits. On large wikis, this can exhaust available server resources. This issue has been patched in versions 16.10.16, 17.4.8 and 17.10.1.

Affected products

• XWiki XWiki: from 1.8, before 16.10.16 (fixed in 16.10.16); from 17.0.0, before 17.4.8 (fixed in 17.4.8); from 17.5.0, before 17.10.1 (fixed in 17.10.1)

Published 2026-04-15. Last modified 2026-06-17.