CVE-2026-116871
CVE-2026-116871 · Semantic MediaWiki 3.0.0 before 7.3.1 Uncontrolled Recursion via Special:Ask
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion vulnerability in LegacyParser::getSubqueryDescription() that processes nested query tokens before depth limits apply. Unauthenticated attackers can submit deeply nested query elements to the action=ask API to consume substantial CPU and memory, tying up request workers.
CVSS 8.7 · High · Fix available
- Published
- Updated
Affected products and versions
semanticmediawiki
- Versions
- ≥ 3.0.0, < 7.3.1: Affected (semver)
- 7.3.1: Not affected (semver)
Update to 7.3.1
Original sources
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-f8vw-wvm6-h2qq
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/756492002752f937a9e115e14330b1181bd8c60c
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/e642f38c708dee7da5e885b8d40be8ffc56f3e87
- https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.3.1-uncontrolled-recursion-via-special-ask
- https://nvd.nist.gov/vuln/detail/CVE-2026-116871