CVE-2026-103446WikiLambda exposes anonymous execution of unsaved Abstract Wikipedia fragments
Updated under an hour ago ()
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It affects The Wikimedia Foundation MediaWiki WikiLambda extension. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.33%, higher than 24% of scored CVEs.
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Authorization bypass through User-Controlled key vulnerability in The Wikimedia Foundation MediaWiki WikiLambda extension allows Authentication Bypass. This issue affects MediaWiki WikiLambda extension: 1.46.
- CVSS
- 7.4 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/S:N/AU:Y/R:U/V:C/RE:M/U:Amber
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.33% (percentile 24)
- Assigned by
- wikimedia-foundation
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
The Wikimedia Foundation MediaWiki WikiLambda extension wikimedia_foundation:mediawiki_wikilambda_extension (from the name) | 1.46 | CNA record |
References
- https://phabricator.wikimedia.org/T435086
- https://gerrit.wikimedia.org/r/q/If2c05b109672fc65f63372f86c768859dc6639fd
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.