Resource exhaustion in Xwiki Org.xwiki.platform:xwiki-Platform-Legacy-Oldcore
CVE-2026-40104
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.
EPSS: 0.004 (32.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
Affected products
- Xwiki Org.xwiki.platform:xwiki-platform-legacy-oldcore — versions >= 1.8-rc-1, < 16.10.16, >= 17.0.0-rc-1, < 17.4.8, >= 17.5.0-rc-1, < 17.10.1
- Xwiki Org.xwiki.platform:xwiki-platform-oldcore — versions >= 1.8-rc-1, < 16.10.16, >= 17.0.0-rc-1, < 17.4.8, >= 17.5.0-rc-1, < 17.10.1
- Xwiki
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-40104?
- CVE-2026-40104 is a high-severity vulnerability in Xwiki Org.xwiki.platform:xwiki-Platform-Legacy-Oldcore, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 8.2/10. Published 2026-04-15.
- How severe is CVE-2026-40104?
- High severity. CVSS v3 base score is 8.2 out of 10.