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  4. CVE 2026 102409 uncontrolled recursion in elasticsearch leading
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Back to active CVEs
Medium · CVSS 6.5CVE-2026-102409

Uncontrolled Recursion in Elasticsearch Leading to Denial of ServiceCVE-2026-102409

Answer in brief

CVE-2026-102409 records a Medium severity (CVSS 6.5) vulnerability in Uncontrolled Recursion in Elasticsearch Leading to Denial of Service. The current sources do not mark it as known exploited. The current feed maps Elastic/Elasticsearch (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 6, 2026Updated Oct 6, 2026Source checked Oct 7, 2026First seen by HOL Oct 6, 2026Material review Oct 6, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Elastic/Elasticsearch (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Elastic/Elasticsearchgeneric>=9.2.0 <=9.2.8 || >=9.3.0 <=9.3.8 || >=9.4.0 <=9.4.7 || >=9.5.0 <=9.5.4Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Elastic/Elasticsearch.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 6, 2026

Sources and claim methodology

  • Source referencediscuss.elastic.co
Upstream source description

Uncontrolled Recursion (CWE-674) in Elasticsearch can allow an authenticated user with low privileges to terminate an Elasticsearch node, resulting in denial of service, via Excessive Allocation (CAPEC-130).

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Gitea OAuth2 refresh token grant accepts access tokensSame generic ecosystem
  • Langflow OSS is affected by multiple vulnerabilitiesSame generic ecosystem
  • Langflow OSS is affected by multiple vulnerabilitiesSame generic ecosystem
  • Langflow OSS is affected by multiple vulnerabilitiesSame generic ecosystem
  • Langflow OSS is affected by multiple vulnerabilitiesSame generic ecosystem
  • Langflow OSS is affected by multiple vulnerabilitiesSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-674
Source
CVE List V5
Source checked
Oct 7, 2026
References
1 linked source
Open source record