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CVE-2026-126562VulnerabilityPublished

SemanticMediaWiki · Semantic MediaWiki 3.0.0 before 7.4.1 contains an uncontrolled recursion vulnerability in the ElasticStore

Affects SemanticMediaWikiSource GCVE Database

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Authoritative record:CVE-2026-126562· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium : upgrade to 7.4.1 when convenient.

Data as of 11 Nov 2026, 04:37 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.05.3
CNA (VulnCheck)CVSS 3.14.3
Patch
Available – fixed in 7.4.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade semanticmediawiki/SemanticMediaWiki to 7.4.1.

Affected software

ProductAffectedFixed in
GitHubsemanticmediawiki/SemanticMediaWikipkg:github/semanticmediawiki/SemanticMediaWikiOther threatsAffected
  • >=3.0.0 <7.4.1
Fixed in
  • 7.4.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Semantic MediaWiki to version 7.4.1 or later, where this uncontrolled recursion vulnerability has been fixed. No other mitigation or workaround is indicated in the available data.

Description

Semantic MediaWiki versions from 3.0.0 up to but not including 7.4.1 contain an uncontrolled recursion vulnerability in the ElasticStore ConceptDescriptionInterpreter. This flaw allows users with page-edit rights to create mutually referencing concept pages, which can cause concept page views, Special:Ask queries, or api.php action=ask queries to exhaust PHP memory or stack resources, resulting in denial of service.

References

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