CVE-2026-102409
MEDIUM 6.5Uncontrolled 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).
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 24th percentile
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.
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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:
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
- none available: Fix deferred
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-2026-102409 · Updated 2026-10-08T12:02:35+00:00quay/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-2026-102409 · Updated 2026-10-08T12:02:35+00:00
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Elastic | Elasticsearch | ≥ 9.2.0 and < 9.4.8 |
| Elastic | Elasticsearch | ≥ 9.5.0 and < 9.5.5 |
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
- https://discuss.elastic.co/t/elasticsearch-9-4-8-9-5-5-security-update-esa-2026-190/390863 CVE record · elastic · Updated 2026-10-06T19:31:40.592Z
NVD · CVE-2026-102409 · Updated 2026-10-13T18:40:20.810
Red Hat · CVE-2026-102409 · Updated 2026-10-08T12:02:35+00:00 - https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102409.json Red Hat · CVE-2026-102409 · Updated 2026-10-08T12:02:35+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-93930 EUVD · EUVD-2026-93930
Technical & other
- https://access.redhat.com/security/cve/CVE-2026-102409 Red Hat · CVE-2026-102409 · Updated 2026-10-08T12:02:35+00:00
- https://bugzilla.redhat.com/show_bug.cgi?id=2547105 Red Hat · CVE-2026-102409 · Updated 2026-10-08T12:02:35+00:00
- https://www.cve.org/CVERecord?id=CVE-2026-102409 Red Hat · CVE-2026-102409 · Updated 2026-10-08T12:02:35+00:00
- https://nvd.nist.gov/vuln/detail/CVE-2026-102409 Red Hat · CVE-2026-102409 · Updated 2026-10-08T12:02:35+00:00