CVE-2026-40104

XWiki's REST APIs can list all pages/spaces, leading to unavailability

HIGH
8.2
CVSS Score
Published: April 15, 2026 at 12:01 AM UTC
Updated: October 26, 2026 at 10:10 PM UTC
2 products affected across 1 vendorXwikiorg.xwiki.platform:xwiki-platform-legacy-oldcore

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Severity
HIGH8.2
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.8 ≤ v < 16.10.1617.0.0 ≤ v < 17.4.817.5.0 ≤ v < 17.10.1
Affected range stops below 16.10.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.10.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 17.4.8, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_MISCIssue TrackingVendor Advisory
Source: cverecord
https://jira.xwiki.org/browse/XWIKI-23550

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-770

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