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CVE-2026-103046VulnerabilityPublished

Wikimedia · Cross-site Scripting

Source GCVE Database

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Authoritative record:CVE-2026-103046· Medium 6.1

Not known to be exploited · CVSS 6.1 Medium : upgrade to 1.46.1 when convenient.

Data as of 11 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.1Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.46.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Upgrade Mediawiki – WikiLambda Extension to 1.46.1.

Affected software

ProductAffectedFixed in
The Wikimedia FoundationMediawiki - WikiLambda ExtensionAffected
  • <1.46.1
Fixed in
  • 1.46.1

AI-suggested

Upgrade the MediaWiki WikiLambda extension to version 1.46.1 or later, where this vulnerability has been fixed. Since this is a self-hosted software component, administrators should apply the official update promptly to remediate the issue. No additional vendor advisory content is available to indicate alternative mitigations or temporary fixes.

Description

A stored cross-site scripting (XSS) vulnerability exists in the Wikimedia Foundation MediaWiki WikiLambda extension prior to version 1.46.1. This vulnerability is due to improper neutralization of input during web page generation, which allows malicious scripts to be stored and executed in users' browsers. The issue is classified as high severity. No CVSS score is provided. No known exploits in the wild have been reported. The vulnerability affects versions before 1.46.1.

References

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