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NVD / CVE Program· CNA GitHub_M

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

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: org.xwiki.platform:xwiki-platform-legacy-oldcore (Maven) 16.10.16, 17.4.8, 17.10.1; org.xwiki.platform:xwiki-platform-oldcore (Maven) 16.10.16, 17.4.8, 17.10.1.

Low priority for now. Upgrade to org.xwiki.platform:xwiki-platform-legacy-oldcore (Maven) 16.10.16, 17.4.8, 17.10.1; org.xwiki.platform:xwiki-platform-oldcore (Maven) 16.10.16, 17.4.8, 17.10.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 6.9 · v4.0—No exploit Fix available
Published
Apr 15, 2026
Updated
Oct 26, 2026
EPSS
0.4% · 34th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
6.9
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-40104

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
xwikixwiki

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • xwiki xwiki1.8 and later · before 16.10.16
  • xwiki xwiki17.0.0 and later · before 17.4.8
  • xwiki xwiki17.5.0 and later · before 17.10.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

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

    • >= 1.8-rc-1, < 16.10.16, >= 17.0.0-rc-1, < 17.4.8, >= 17.5.0-rc-1, < 17.10.1affected

  • xwiki org.xwiki.platform:xwiki-platform-oldcore

    • >= 1.8-rc-1, < 16.10.16, >= 17.0.0-rc-1, < 17.4.8, >= 17.5.0-rc-1, < 17.10.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Mavenorg.xwiki.platform:xwiki-platform-legacy-oldcorefrom 1.8-rc-1 · before 16.10.1616.10.16
Mavenorg.xwiki.platform:xwiki-platform-legacy-oldcorefrom 17.0.0-rc-1 · before 17.4.817.4.8
Mavenorg.xwiki.platform:xwiki-platform-legacy-oldcorefrom 17.5.0-rc-1 · before 17.10.117.10.1
Mavenorg.xwiki.platform:xwiki-platform-oldcorefrom 1.8-rc-1 · before 16.10.1616.10.16
Mavenorg.xwiki.platform:xwiki-platform-oldcorefrom 17.0.0-rc-1 · before 17.4.817.4.8
Mavenorg.xwiki.platform:xwiki-platform-oldcorefrom 17.5.0-rc-1 · before 17.10.117.10.1

Same product

xwiki: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-24893Remote code execution as guest via SolrSearchMacros request in xwikiKEV
    99Now
  • CVE-2024-21650XWiki Remote Code Execution vulnerability via user registration
    67This week
  • CVE-2023-46731Remote code execution through the section parameter in Administration as guest in XWiki Platform
    66This week

Published before and after this one in the same product

  • ← EarlierCVE-2026-26000Feb 12, 2026 · XWiki Platform affected by click-jacking through CSS injection in comments
    21Monitor
  • ← EarlierCVE-2026-33229Apr 8, 2026 · XWiki Platform affected by remote code execution with script right through unprotected Velocity scripting API
    34Monitor
  • Later →CVE-2026-40105Apr 15, 2026 · XWiki has Reflected Cross-Site Scripting (XSS) in its page history compare functionality
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Maven:org.xwiki.platform:xwiki-platform-legacy-oldcore16.10.16Package registry (OSV)
Maven:org.xwiki.platform:xwiki-platform-legacy-oldcore17.10.1Package registry (OSV)
Maven:org.xwiki.platform:xwiki-platform-legacy-oldcore17.4.8Package registry (OSV)
Maven:org.xwiki.platform:xwiki-platform-oldcore16.10.16Package registry (OSV)
Maven:org.xwiki.platform:xwiki-platform-oldcore17.10.1Package registry (OSV)
Maven:org.xwiki.platform:xwiki-platform-oldcore17.4.8Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-66473126 days apartXWiki's REST APIs don't enforce any limits, leading to unavailability and OOM in large wikis
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-770 · Allocation of Resources Without Limits or Throttling

CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records