CVE-2026-103046

WikifunctionsFragmentRenderer does unsafe string replacements on user-provided HTML

MEDIUM
6.1
CVSS Score
Published: September 29, 2026 at 10:41 PM UTC
Updated: September 30, 2026 at 09:17 PM UTC
1 product affected across 1 vendorWikiLambda

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - WikiLambda extension allows Stored XSS. This issue affects MediaWiki - WikiLambda extension: before 1.46.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.46.1
Affected range stops below 1.46.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Issue Tracking
Source: cverecord
https://phabricator.wikimedia.org/T428829
Mitigation
Source: cverecord
https://gerrit.wikimedia.org/r/c/1307827

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-79

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