CVE-2026-58517mediumCWE-288

CVE-2026-58517: medium-severity vulnerability in The Wikimedia Foundation Mediawiki…

Blocked users can create and edit WikiLambda objects

Published

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.9epss 0.3%
Improper neutralization of input terminators vulnerability in The Wikimedia Foundation Mediawiki - WikiLambda Extension allows Authentication Bypass. This issue affects Mediawiki - WikiLambda Extension: from * before 1.43.9,1.44.6,1.45.4.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Affected products
The Wikimedia Foundation · Mediawiki - WikiLambda Extension
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CVE-2025-62695MEDIUMStored XSS through system messagesEPSS 0.4%CVE-2026-96872LOWWikiLambda public function execution bypasses the unsaved-code permission through nested Z825 compositionsEPSS 0.3%CVE-2026-103046MEDIUMWikifunctionsFragmentRenderer does unsafe string replacements on user-provided HTMLEPSS 0.2%