CVE-2026-40104Network attack vector

Service interruption via unbounded database-list metadata queries

Published Apr 15, 2026 · Updated Apr 15, 2026

Resource exhaustion in XWiki Platform Old Core modules allows remote attackers to interrupt service through crafted REST API requests. DBListClass.getDBList executes database-list queries without applying the configured query-item limit, so property metadata can enumerate every available page or space. The unauthenticated endpoint is network reachable, and large wikis can exhaust server resources and become unavailable.

CVSS severity6.9
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in XWiki Platform Old Core modules allows remote attackers to interrupt service through crafted REST API requests. DBListClass.getDBList executes database-list queries without applying the configured query-item limit, so property metadata can enumerate every available page or space. The unauthenticated endpoint is network reachable, and large wikis can exhaust server resources and become unavailable.

The record

CVE
CVE-2026-40104
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
CryptPad
Product
XWiki Platform Legacy Old Core
Classifications
CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 17.0.0-rc-1, < 17.4.8
  2. Affected versionversion=>= 17.5.0-rc-1, < 17.10.1
  3. Affected versionversion=>= 1.8-rc-1, < 16.10.16

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CryptPad · XWiki Platform Legacy Old Coreversion=>= 17.0.0-rc-1, < 17.4.8; version=>= 17.5.0-rc-1, < 17.10.1; version=>= 1.8-rc-1, < 16.10.16
CryptPad · XWiki Platform Old Coreversion=>= 17.0.0-rc-1, < 17.4.8; version=>= 17.5.0-rc-1, < 17.10.1; version=>= 1.8-rc-1, < 16.10.16

Published CVSS scores

6.9GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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