Quick answers
- Is CVE-2026-116890 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-116890 being exploited in the wild.
- How severe is CVE-2026-116890?
- High severity, with a CVSS score of 7.3, published 27 October 2026.
- Which products and versions are affected?
- SemanticMediaWiki Semantic MediaWiki 3.0.0 to 7.2.1.
- Is there a fix for CVE-2026-116890?
- Yes: fixed in 7.3.0. Until then: If unable to upgrade, disable the endpoint in localSettings.php by adding: wgExtensionFunctions[] = static function () { unset( $GLOBALS['wgAPIModules']['smwtask'] ); }; Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-116890 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-116890?
- Check whether you run SemanticMediaWiki Semantic MediaWiki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 7.3.0
If unable to upgrade, disable the endpoint in localSettings.php by adding: wgExtensionFunctions[] = static function () { unset( $GLOBALS['wgAPIModules']['smwtask'] ); };
Technical details
The SMW\MediaWiki\Api\Task::execute() method in api.php performs no authorization checks despite backing admin-only maintenance operations. While the method enforces a CSRF token check and write-mode requirements, the anonymous CSRF token (+\) is publicly known and fixed for all unauthenticated users, effectively providing no protection. Attackers can invoke tasks like table-statistics (information disclosure), insert-job (enqueue arbitrary jobs), and run-joblist (execute synchronously) via direct API calls, with the integrity impact extending to targeted entity disposal via smw.entityIdDisposer.
Affected products
- SemanticMediaWiki Semantic MediaWiki 3.0.0 to 7.2.1
Timeline
- 2026-09-16: disclosed: GitHub security advisory published
- 2026-10-27: advisory: Public advisory published on NVD