CVE-2026-100242High· 7.5▾ MidnightPoC available

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 Exten…

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score53/ 100 · Moderate

impact 41.3 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

…

Published

Sep 29, 2026

Updated

Oct 1, 2026

CVSS

7.5

Vendor

Wikimedia Foundation

Product

Mediawiki - DataTransfer Extension

CWE

CWE-400, CWE-1395

Depth score

53 · Moderate

EPSS

0.41% · p35

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

decided 2026-10-01

Exploitation: poc
Automatable: yes
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 30.

0.2% → 0.4%▲ 0.3%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

7 events · 27 days

Sep 29, 2026Published
Disclosed via NVD
Sep 30, 2026EPSS first tracked
0.2%
Oct 1, 2026Record revised
Last analysed / modified upstream
Oct 1, 2026Public exploit observed
Exploit / PoC code exists
Oct 1, 2026CVSS changed
— → 7.5
Oct 1, 2026Severity changed
none → high
Oct 26, 2026EPSS peak
0.2% → 0.4%

Wikimedia Foundation CWE-400 CWE-1395 #nvd #cve.org #exploit-available

Affected

mediawiki_-_datatransfer_extension >= 1.46.0 < 1.47.0

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Change history

Field changes observed since this record was first indexed.

Oct 1, 2026Public exploit / PoC published
Oct 1, 2026CVSS — → 7.5
Oct 1, 2026Severity none → high

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org#exploit-available

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CVE-2026-100242High· 7.5▾ MidnightPoC available

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 Exten…

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score53/ 100 · Moderate

impact 41.3 · likelihood 0.1 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

…

Published

Sep 29, 2026

Updated

Oct 1, 2026

CVSS

7.5

Vendor

Wikimedia Foundation

Product

Mediawiki - DataTransfer Extension

CWE

CWE-400, CWE-1395

Depth score

53 · Moderate

EPSS

0.41% · p35

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

decided 2026-10-01

Exploitation: poc
Automatable: yes
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 30.

0.2% → 0.4%▲ 0.3%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

7 events · 27 days

Sep 29, 2026Published
Disclosed via NVD
Sep 30, 2026EPSS first tracked
0.2%
Oct 1, 2026Record revised
Last analysed / modified upstream
Oct 1, 2026Public exploit observed
Exploit / PoC code exists
Oct 1, 2026CVSS changed
— → 7.5
Oct 1, 2026Severity changed
none → high
Oct 26, 2026EPSS peak
0.2% → 0.4%

Wikimedia Foundation CWE-400 CWE-1395 #nvd #cve.org #exploit-available

Affected

mediawiki_-_datatransfer_extension >= 1.46.0 < 1.47.0

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Change history

Field changes observed since this record was first indexed.

Oct 1, 2026Public exploit / PoC published
Oct 1, 2026CVSS — → 7.5
Oct 1, 2026Severity none → high

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org#exploit-available