CVE-2026-103046— WikifunctionsFragmentRenderer does unsafe string replacements on user-provided HTML
Quick assessment
Affected
The Wikimedia Foundation Mediawiki - WikiLambda Extension
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在网页生成过程中，对输入数据的处理不当（即“跨站脚本攻击”，XSS）漏洞存在于 Wikimedia Foundation 的 MediaWiki - WikiLambda 扩展中，可导致存储型 XSS 攻击。 此问题影响 MediaWiki - WikiLambda 扩展：版本低于 1.46.1。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1189 · Drive-by Compromise
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I. Basic Information for CVE-2026-103046
Vulnerability Information
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Vulnerability Title
WikifunctionsFragmentRenderer does unsafe string replacements on user-provided HTML
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| The Wikimedia Foundation | Mediawiki - WikiLambda Extension | 0 ~ 1.46.1 | - |
|
II. Public POCs for CVE-2026-103046
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-103046 (2)
-
https://gerrit.wikimedia.org/r/c/1307827 mitigation
-
https://phabricator.wikimedia.org/T428829 issue-tracking
Same Patch Batch · The Wikimedia Foundation · 2026-09-29 · 8 CVEs total
| CVE-2026-103044 | EasyTimeline should not serve image maps as application/xml | |
| CVE-2026-103047 | XSS through i18n message in CentralAuth | |
| CVE-2026-103045 | XSS in Refreshed skin | |
| CVE-2026-103050 | Stored i18n XSS in MassMessage | |
| CVE-2026-103048 | Open Redirect in Special:Book | |
| CVE-2026-103049 | XSS in Cargo's Special:CargoQuery page due to unsanitized table headers | |
| CVE-2026-103051 | Stored i18n XSSs in CentralNotice |
IV. Related Vulnerabilities
Same product: Mediawiki - WikiLambda Extension
-
CVE-2026-100383
Stored i18n XSS in WikiLambda's VisualEditor integration -
CVE-2026-100377
Revision-deleted pages can be viewed through WikiLambda's ac -
CVE-2026-96872
WikiLambda public function execution bypasses the unsaved-co -
CVE-2026-58517
Blocked users can create and edit WikiLambda objects -
CVE-2025-62695
Stored XSS through system messages
Same vendor: The Wikimedia Foundation
V. Comments for CVE-2026-103046
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