cve.bz

CVE-2026-126562 Semantic MediaWiki 3.0.0 before 7.4.1 Uncontrolled Recursion via ElasticStore ConceptDescriptionInterpreter

5.3 mediumEPSS 0.4%

Medium (5.3) in semanticmediawiki semanticmediawiki. EPSS 0.4% estimated probability of exploitation activity in the next 30 days.

On this page
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.

Severity

CVSS 4.0

5.3 medium
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

CVSS 3.1

4.3 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS
0.4% estimated probability of exploitation activity in the next 30 days; 29th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: PoC · Automatable: no · Technical impact: partial, assessed 2026-11-14. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-674 Uncontrolled Recursion
Published
Modified
Assigned by
VulnCheck (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

Ask an AI about this CVE

ChatGPTClaudeGoogle AI Mode

Show the promptExplain CVE-2026-126562 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-126562?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-126562?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-126562 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.

Badge for a README or a site

CVE-2026-126562

An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:

[![CVE-2026-126562](https://cve.bz/cve/badge/CVE-2026-126562.svg)](https://cve.bz/cve/CVE-2026-126562)

HTML:

<a href="https://cve.bz/cve/CVE-2026-126562"><img src="https://cve.bz/cve/badge/CVE-2026-126562.svg" alt="CVE-2026-126562"></a>

Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
SemanticMediaWikifrom 3.0.0 before 7.4.1

Attack patterns (CAPEC)

  • CAPEC-230 Serialized Data with Nested Payloads Likelihood: Medium · Severity: High
  • CAPEC-231 Oversized Serialized Data Payloads Likelihood: Medium · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

Check your stackJSON