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

Quick assessment

Affected
xwiki org.xwiki.platform:xwiki-platform-oldcore
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

XWiki Platform是XWiki开源的一套用于创建Web协作应用程序的Wiki平台。 XWiki Platform 1.8-rc-1、17.0.0-rc-1和17.5.0-rc-1及之前版本存在安全漏洞，该漏洞源于REST API端点存在资源耗尽问题，可能导致服务器资源耗尽。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.40% · P33

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-40104

Vulnerability Information
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Vulnerability Title
XWiki's REST APIs can list all pages/spaces, leading to unavailability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
XWiki Platform 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
XWiki Platform是XWiki开源的一套用于创建Web协作应用程序的Wiki平台。 XWiki Platform 1.8-rc-1、17.0.0-rc-1和17.5.0-rc-1及之前版本存在安全漏洞，该漏洞源于REST API端点存在资源耗尽问题，可能导致服务器资源耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
xwiki org.xwiki.platform:xwiki-platform-oldcore >= 1.8-rc-1, < 16.10.16 -
xwiki org.xwiki.platform:xwiki-platform-legacy-oldcore >= 1.8-rc-1, < 16.10.16 -

II. Public POCs for CVE-2026-40104

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III. Intelligence Information for CVE-2026-40104

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Patches & Fixes for CVE-2026-40104 (1)

Vendor Advisories for CVE-2026-40104 (1)

IV. Related Vulnerabilities

Same vendor: xwiki
Same weakness: CWE-770

V. Comments for CVE-2026-40104

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