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CVE-2026-116871

7.5, high

Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion vulnerability in LegacyParser::getSubqueryDescription() that…

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
n/a
Exploitation
No public evidence
Published
27 Oct 2026yesterday

Description

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.

Details

Vendor
SemanticMediaWiki
Product
SemanticMediaWiki
Weakness
CWE-674 (opens in a new tab)
Status
Awaiting analysis
Updated
27 Oct 2026
Assigner
disclosure@vulncheck.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References 4

Patches and fixes 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other SemanticMediaWiki CVEs

Every SemanticMediaWiki CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-116872 Semantic MediaWiki from 3.0.0 before 7.3.1 contains an algorithmic complexity vulnerability in TermParser::normalize_compact_form() that… 7.5, high
  • CVE-2026-116873 SemanticMediaWiki Missing Authorization Vulnerability 7.3, high
  • CVE-2026-116876 SemanticMediaWiki Missing Authorization Vulnerability 7.1, high
  • CVE-2026-116880 SemanticMediaWiki Cross-Site Request Forgery Vulnerability 7.1, high

Beyond this page

Is CVE-2026-116871 in your network?

This page tells you how dangerous CVE-2026-116871 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 28 Oct 2026, not the live upstream state.