---
id: CVE-2026-116871
title: 'Semantic MediaWiki 3.0.0 before 7.3.1 Uncontrolled Recursion via Special:Ask'
summary: >-
  Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion
  vulnerability in LegacyParser::getSubqueryDescription() that processes nested
  query tokens before depth limits apply. Unauthenticated attackers can submit
  deeply ne…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-674
vendor: SemanticMediaWiki
product: SemanticMediaWiki
affected:
  - SemanticMediaWiki >= 3.0.0 < 7.3.1
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T10:26:38.191Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116871'
references:
  - url: >-
      https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-f8vw-wvm6-h2qq
    label: GitHub Security Advisory (GHSA-f8vw-wvm6-h2qq)
  - url: >-
      https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/756492002752f937a9e115e14330b1181bd8c60c
  - url: >-
      https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/e642f38c708dee7da5e885b8d40be8ffc56f3e87
  - url: >-
      https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.3.1-uncontrolled-recursion-via-special-ask
    label: >-
      VulnCheck Advisory: Semantic MediaWiki 3.0.0 before 7.3.1 Uncontrolled
      Recursion via Special:Ask
tags:
  - cve.org
ingestedAt: '2026-10-27T16:11:59.284Z'
---

## Overview

Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion vulnerability in LegacyParser::getSubqueryDescription() that processes nested query tokens before depth limits apply. Unauthenticated attackers can submit deeply nested query elements to the action=ask API to consume substantial CPU and memory, tying up request workers.

## Affected

- `SemanticMediaWiki >= 3.0.0 < 7.3.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.