CVE-2026-100244High· 7.5▾ Twilight

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows Excavation. This issue affects Mediawiki - CentralAuth Extension: from * before 1.46.1, 1.45.5, 1.…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score41/ 100 · Moderate

impact 41.3 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Sep 29, 2026

Updated

Sep 30, 2026

CVSS

7.5

Vendor

Wikimedia Foundation

Product

Mediawiki - CentralAuth Extension

CWE

CWE-200

Depth score

41 · Moderate

EPSS

0.26% · p17

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-09-30

Exploitation: none
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.

0.1% → 0.3%▲ 0.1%

Timeline

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

6 events · 2 days

Sep 29, 2026Published
Disclosed via NVD
Sep 30, 2026Record revised
Last analysed / modified upstream
Sep 30, 2026EPSS first tracked
0.1%
Sep 30, 2026CVSS changed
— → 7.5
Sep 30, 2026Severity changed
none → high
Oct 1, 2026EPSS peak
0.1% → 0.3%

Wikimedia Foundation CWE-200 #nvd #cve.org

Affected

mediawiki_-_centralauth_extension < 1.46.1, 1.45.5, 1.43.10

Full technical detail▾

Overview

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows Excavation.

This issue affects Mediawiki - CentralAuth Extension: from * before 1.46.1, 1.45.5, 1.43.10.

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.

Sep 30, 2026CVSS — → 7.5
Sep 30, 2026Severity none → high

Related vulnerabilities

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

#nvd#cve.org

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CVE-2026-100244High· 7.5▾ Twilight

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows Excavation. This issue affects Mediawiki - CentralAuth Extension: from * before 1.46.1, 1.45.5, 1.…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score41/ 100 · Moderate

impact 41.3 · likelihood 0.1 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Sep 29, 2026

Updated

Sep 30, 2026

CVSS

7.5

Vendor

Wikimedia Foundation

Product

Mediawiki - CentralAuth Extension

CWE

CWE-200

Depth score

41 · Moderate

EPSS

0.26% · p17

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-09-30

Exploitation: none
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.

0.1% → 0.3%▲ 0.1%

Timeline

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

6 events · 2 days

Sep 29, 2026Published
Disclosed via NVD
Sep 30, 2026Record revised
Last analysed / modified upstream
Sep 30, 2026EPSS first tracked
0.1%
Sep 30, 2026CVSS changed
— → 7.5
Sep 30, 2026Severity changed
none → high
Oct 1, 2026EPSS peak
0.1% → 0.3%

Wikimedia Foundation CWE-200 #nvd #cve.org

Affected

mediawiki_-_centralauth_extension < 1.46.1, 1.45.5, 1.43.10

Full technical detail▾

Overview

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows Excavation.

This issue affects Mediawiki - CentralAuth Extension: from * before 1.46.1, 1.45.5, 1.43.10.

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.

Sep 30, 2026CVSS — → 7.5
Sep 30, 2026Severity none → high

Related vulnerabilities

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

#nvd#cve.org