CVE-2026-40104: XWiki's REST APIs can list all pages/spaces, leading to unavailability

Description

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.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

Low

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 34% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

OR

org.xwiki.platform:xwiki-platform-legacy-oldcore · xwiki

>= 1.8-rc-1, < 16.10.16; >= 17.0.0-rc-1, < 17.4.8; >= 17.5.0-rc-1, < 17.10.1 · source: vendor

OR

org.xwiki.platform:xwiki-platform-oldcore · xwiki

>= 1.8-rc-1, < 16.10.16; >= 17.0.0-rc-1, < 17.4.8; >= 17.5.0-rc-1, < 17.10.1 · source: vendor

XW

Xwiki · Xwiki

1.8 before 16.10.16; 17.0.0 before 17.4.8; 17.5.0 before 17.10.1 · source: NVD