CVE-2026-116877
CVE-2026-116877 · Semantic MediaWiki 2.5.0 before 7.3.1 Resource Exhaustion via #set_recurring_event
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Semantic MediaWiki from 2.5.0 before 7.3.1 contains an uncontrolled resource consumption vulnerability that allows low-privilege editors to bypass smwgMaxNumRecurringEvents by supplying a large limit parameter. Attackers can save pages using #set_recurring_event without an end date to generate thousands or millions of date subobjects, exhausting CPU, memory, and database resources.
CVSS 8.7 · High · Fix available
- Published
- Updated
Affected products and versions
semanticmediawiki
- Versions
- ≥ 2.5.0, < 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-vxrm-2g9f-2vqh
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/215599f0fc03274fd4cee9ba0f7162f5a38c031b
- https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.3.1-resource-exhaustion-via-set-recurring-event
- https://nvd.nist.gov/vuln/detail/CVE-2026-116877