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  4. CVE 2026 100242 datatransfer depends on phpspreadsheet version
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Back to active CVEs
High · CVSS 7.5CVE-2026-100242

DataTransfer depends on phpspreadsheet version vulnerable to CVE-2026-59933 (XLS/OLE memory exhaustion)CVE-2026-100242

Answer in brief

CVE-2026-100242 records a High severity (CVSS 7.5) vulnerability in DataTransfer depends on phpspreadsheet version vulnerable to CVE-2026-59933 (XLS/OLE memory exhaustion). The current sources do not mark it as known exploited. The current feed maps Wikimedia Foundation/Mediawiki - DataTransfer 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 Oct 1, 2026Source checked Nov 13, 2026First seen by HOL Sep 29, 2026Material review Oct 1, 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
Available

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 - DataTransfer Extension (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Wikimedia Foundation/Mediawiki - DataTransfer Extensiongeneric>=1.46.0 <1.47.01.47.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Wikimedia Foundation/Mediawiki - DataTransfer Extension.
  2. 2Review the reported fix. Update Wikimedia Foundation/Mediawiki - DataTransfer Extension to 1.47.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 29, 2026

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

  2. Source modified

    Oct 1, 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
  • GitHub security advisorygithub.com
  • Source referencephabricator.wikimedia.org
Upstream source description

Dependency on Vulnerable Third-Party Component and Uncontrolled Resource Consumption vulnerability in Wikimedia Foundation Mediawiki - DataTransfer Extension allows Excessive Allocation. This issue affects Mediawiki - DataTransfer Extension: from 1.46.0 before 1.47.0.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • dnspython excessive memory and CPU useAlso CWE-400
  • AIOHTTP: Base64 multipart parts bypass client_max_sizeAlso CWE-400
  • AIOHTTP: Concatenated compressed streams cause excessive CPU useAlso CWE-400
  • AIOHTTP: WebSocket receive queue limits bypassed by small or compressed messagesAlso CWE-400

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-1395, CWE-400
Source
CVE List V5
Source checked
Nov 13, 2026
References
3 linked sources
Open source record