Vulnerability · Published Oct 27, 2026 · Assigned by VulnCheck

CVE-2026-116890Semantic MediaWiki 3.0.0 before 7.3.0 Missing Authorization via smwtask API

High 7.3

In plain English

A high-severity missing authorization in SemanticMediaWiki from SemanticMediaWiki. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.2%top 90.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Semantic MediaWiki from 3.0.0 before 7.3.0 contains a missing authorization vulnerability in the api.php smwtask module that allows unauthenticated attackers to run admin-only maintenance tasks. Attackers can use the public anonymous CSRF token to read internal store statistics, enqueue jobs like smw.entityIdDisposer, and execute queued jobs, degrading performance and altering semantic data.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	mediawiki/semantic-media-wiki	7.3.0	GHSA-jr78-w6w5-m8f8

Affected products (as reported)

Vendor	Product	Versions
SemanticMediaWiki	SemanticMediaWiki	3.0.0 – before 7.3.0

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References

GitHub Security Advisory (GHSA-jr78-w6w5-m8f8) vendor-advisory
VulnCheck Advisory: Semantic MediaWiki 3.0.0 before 7.3.0 Missing Authorization via smwtask API third-party-advisory