What is CVE-2026-116890?

CVE-2026-116890 is a high-severity vulnerability in Semanticmediawiki, classified under Missing Authorization. CVSS score: 7.3/10. Published 2026-10-27.

How severe is CVE-2026-116890?

High severity. CVSS v3 base score is 7.3 out of 10.

Auth bypass in Semanticmediawiki

CVE-2026-116890

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.

Vulnerability class: Broken Access Control

Published 2026-10-27 · last modified 2026-10-27.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Semanticmediawiki

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-jr78-w6… (vendor-advisory)
www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.3.0-missing-auth… (third-party-advisory)

Frequently asked questions

What is CVE-2026-116890?: CVE-2026-116890 is a high-severity vulnerability in Semanticmediawiki, classified under Missing Authorization. CVSS score: 7.3/10. Published 2026-10-27.
How severe is CVE-2026-116890?: High severity. CVSS v3 base score is 7.3 out of 10.