What is CVE-2026-116876?

CVE-2026-116876 is a high-severity vulnerability in Semanticmediawiki, classified under Missing Authorization. CVSS score: 7.1/10. Published 2026-10-27.

How severe is CVE-2026-116876?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Semanticmediawiki

CVE-2026-116876

Semantic MediaWiki from 2.5.0 before 7.3.1 contains an improper authorization vulnerability that allows ordinary editors to permanently protect pages by adding an Is edit protected annotation. When $smwgEditProtectionRight is enabled, EditProtectionUpdater applies indefinite edit and move restrictions without checking the author's rights, locking other editors and administrators out.

Vulnerability class: Broken Access Control

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

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H.

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-9824-67… (vendor-advisory)
github.com/SemanticMediaWiki/SemanticMediaWiki/commit/d2a198f42184373bb8604450c… (patch)
www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.3.1-missing-auth… (third-party-advisory)

Frequently asked questions

What is CVE-2026-116876?: CVE-2026-116876 is a high-severity vulnerability in Semanticmediawiki, classified under Missing Authorization. CVSS score: 7.1/10. Published 2026-10-27.
How severe is CVE-2026-116876?: High severity. CVSS v3 base score is 7.1 out of 10.