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CVE-2026-116879

Semantic-mediawiki Semantic Mediawiki: missing authorisation

Risk score
40/100
CVSS
5.4 v3.1
Exploit chance (30 days)
0.2%
Published
27 Oct 2026

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What to know

What it is
Semantic MediaWiki from 7.3.0 before 7.3.1 contains a missing authorization vulnerability in the smwtask update task that allows users with edit rights to force semantic updates on arbitrary pages. Attackers can supply a serialized subject parameter for a restricted page to trigger forced reparsing, semantic-store wri…
Affected
Semantic-mediawiki Semantic Mediawiki before 7.3.1
Fix
Upgrade Semantic-mediawiki Semantic Mediawiki to 7.3.1 or later.
Exploitation
Public proof of concept

Story map

Story map: Semantic-mediawiki Semantic MediawikiTHE FLAWSTHE FIXCVE-2026-116879Missing authorisationCVSS 5.4 · EPSS 0%CVE-2026-116890Missing authorisationCVSS 7.3 · EPSS 0%CVE-2026-116878Denial of serviceCVSS 7.5 · EPSS 0%CVE-2026-116871Semantic MediaWiki 3.0.0before 7.3.1 contains anuncontrolled recursion…CVSS 7.5 · EPSS 0%Upgrade…7.3.1 · 7.3.0or later on your release lineWho is exposedSemantic-mediawiki SemanticMediawiki before 7.3.0AMBER · PATCH THIS WEEKSemantic-mediawiki Semantic…Semantic MediaWiki from 3.0.0before 7.3.0 contains a missingauthorization vulnerability in theapi.php smwtask module thatallows unauthenticatedattackers to run admin-onlymaintenance tasks. Attackers…Where it standsPublic proof of conceptCONNECTS TOSame weaknessMissing authorisation (CWE-862)398 other warnings in 30 days →Same productEarlier Semantic-mediawiki Semantic Mediawikiwarnings18 in the last 90 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Semantic-mediawiki Semantic Mediawiki: Amber, patch this week. 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,…

The flaws

  • CVE-2026-116879: Missing authorisation (CVSS 5.4 · EPSS 0%)
  • CVE-2026-116890: Missing authorisation (CVSS 7.3 · EPSS 0%)
  • CVE-2026-116878: Denial of service (CVSS 7.5 · EPSS 0%)
  • CVE-2026-116871: Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion vulnerability in… (CVSS 7.5 · EPSS 0%)

The fix

Upgrade Semantic-mediawiki Semantic Mediawiki: 7.3.1 · 7.3.0 or later on your release line

Who is exposed: Semantic-mediawiki Semantic Mediawiki before 7.3.0

Where it stands

  • Public proof of concept

Connects to

Why it is Yellow

  • CVSS 5.4 medium
  • Public exploit or proof of concept referenced

References

Original description

Semantic MediaWiki from 7.3.0 before 7.3.1 contains a missing authorization vulnerability in the smwtask update task that allows users with edit rights to force semantic updates on arbitrary pages. Attackers can supply a serialized subject parameter for a restricted page to trigger forced reparsing, semantic-store writes, and resource-intensive dependency work.

Last activity 27 Oct 2026. Patch Forecast updates every hour.