---
id: "CVE-2026-126562"
page: "https://infrastack.ai/live/CVE-2026-126562"
kind: "vulnerability"
aliases: ["CVE-2026-126562"]
title: "Semantic MediaWiki: mutually referencing concept pages exhaust PHP memory or stack"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["elasticsearch", "mediawiki", "package", "php", "semantic-mediawiki"]
not_affected_if: ["no-elasticstore", "version-7.4.1-or-later"]
published_at: "2026-11-11T03:16:50+00:00"
first_seen_at: "2026-11-11T03:24:59+00:00"
updated_at: "2026-11-11T03:26:32+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126562", "first_seen_at": "2026-11-11T03:24:59+00:00"}]
exploit_sources: []
---

# Semantic MediaWiki: mutually referencing concept pages exhaust PHP memory or stack

Link for people: https://infrastack.ai/live/CVE-2026-126562 (this .md is for agents)

Semantic MediaWiki before 7.4.1 fails to detect concept pages that reference each other in a loop when the ElasticStore backend is used. A user who can edit pages can create such a loop, so viewing the concept, running Special:Ask, or calling api.php action=ask makes PHP run out of memory or stack and fail.

_Summary, check and fix written by a model from the sources; labelled as such._

## Fix

- Semantic MediaWiki: move to `7.4.1` or later.

## Timeline

- 2026-11-11T03:24:59+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126562

## Documents

- [advisory] Vendor advisory: github.com https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-jwx8-mm92-gv95
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.4.1-uncontrolled-recursion-via-elasticstore-conceptdescriptioninterpreter
- [fix] Patch: github.com https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/35d8f8c9c7b48a476751ca0b795b78b648756828
- [fix] Release notes: github.com https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1

## From the sources

Semantic MediaWiki 3.0.0 before 7.4.1 contains an uncontrolled recursion vulnerability in the ElasticStore ConceptDescriptionInterpreter that only detects directly self-referencing concepts. Users with page-edit rights can create mutually referencing concept pages, causing concept page views, Special:Ask, or api.php action=ask queries to exhaust PHP memory or stack.

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