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  4. CVE 2026 100241 private change tags exposed to anonymous users
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Back to active CVEs
High · CVSS 7.5CVE-2026-100241

Private change tags exposed to anonymous users via revision-tags-change eventsCVE-2026-100241

Answer in brief

CVE-2026-100241 records a High severity (CVSS 7.5) vulnerability in Private change tags exposed to anonymous users via revision-tags-change events. The current sources do not mark it as known exploited. The current feed maps Wikimedia Foundation/Mediawiki - EventBus Extension (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 29, 2026Updated Sep 30, 2026Source checked Nov 13, 2026First seen by HOL Sep 29, 2026Material review Sep 30, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Wikimedia Foundation/Mediawiki - EventBus Extension (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Wikimedia Foundation/Mediawiki - EventBus Extensiongeneric1.47.0-alphaNot reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Wikimedia Foundation/Mediawiki - EventBus Extension.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 29, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 29, 2026

Sources and claim methodology

  • Source referencegerrit.wikimedia.org
  • Source referencephabricator.wikimedia.org
Upstream source description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - EventBus Extension allows Excavation. This issue affects Mediawiki - EventBus Extension: 1.47.0-alpha.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • SvelteKit: Build-time server-only module import guard could fail, resulting in server secrets being statically replaced in client bundleAlso CWE-200

Record context

Vulnerability class
Arbitrary File Read
EPSS
Not reported
CWE IDs
CWE-200
Source
CVE List V5
Source checked
Nov 13, 2026
References
2 linked sources
Open source record