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CVE-2026-103006

MEDIUM 6.5

Published 2026-10-06 · Last modified 2026-10-06

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to Denial of Service via a specially crafted, deeply nested request submitted to the aggregation feature of the search API. Elasticsearch contains an uncontrolled recursion weakness in its search aggregation processing. An authenticated user with read access to a single index can submit a specially crafted request containing deeply nested aggregation definitions. Processing this request triggers unbounded recursive execution that exhausts the server process's available resources, causing the affected node to terminate. The node does not recover automatically and requires manual intervention to restore service.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 35th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

6.5CVSS 3.1 · MEDIUM

  • ConfidentialityNone
  • IntegrityNone
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Elastic

Products Elasticsearch

Weakness (CWE)

  • CWE-674: Uncontrolled Recursion

CVSS vector

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

References and research data (JSON)

Vendor product assessments

  • rhoai/odh-feature-server-rhel9 as a component of Red Hat OpenShift AI (RHOAI) · known affected

    Vendor assessment for this product only.

    pkg:oci/odh-feature-server-rhel9?repository_url=registry.redhat.io/rhoai/odh-feature-server-rhel9

    • workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    • none available: Fix deferred
    Red Hat · CVE-2026-103006 · Updated 2026-10-08T11:35:45+00:00
  • quay/quay-rhel8 as a component of Red Hat Quay 3 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:oci/quay-rhel8?repository_url=registry.redhat.io/quay/quay-rhel8

    Red Hat · CVE-2026-103006 · Updated 2026-10-08T11:35:45+00:00
  • quay/quay-rhel9 as a component of Red Hat Quay 3 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:oci/quay-rhel9?repository_url=registry.redhat.io/quay/quay-rhel9

    Red Hat · CVE-2026-103006 · Updated 2026-10-08T11:35:45+00:00

Known Affected Software Configurations

VendorProductVersion range
ElasticElasticsearch≥ 8.0.0 and < 8.19.21
ElasticElasticsearch≥ 9.0.0 and < 9.4.6
ElasticElasticsearch≥ 9.5.0 and < 9.5.2

All CVSS metrics

  • MEDIUM 6.5 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • MEDIUM 6.5 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS