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TI-2026-84417 Aliases CVE-2026-115290GHSA-6f4f-c5j2-2rrx

Uncontrolled recursion in Elasticsearch lets attackers crash nodes

Priority LOW 39CWE-674Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-674.

Summary

Elasticsearch from 8.10.0 through 8.19.23, from 9.0.0 through 9.4.8, and from 9.5.0 through 9.5.5 contains uncontrolled recursion (CWE-674) when it processes nested serialized payloads. An unauthenticated attacker with network access to the remote cluster server interface of a node can send a specially crafted request that causes the node to terminate. The attacker can repeat the request against each reachable node.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads (CAPEC-230). An unauthenticated attacker with network access to the remote cluster server interface of a node can send a specially crafted request that causes the node to terminate. No credentials are required. The attacker can repeat the request against each reachable node.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00413 35th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ElasticElasticsearch8.10.0 – 8.19.23; 9.0.0 – 9.4.8; 9.5.0 – 9.5.5—No fix listedCNA
  • Elasticsearch VendorElastic Affected 8.10.0 – 8.19.23; 9.0.0 – 9.4.8; 9.5.0 – 9.5.5 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*——Elastic
  • cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:* Versions — — ·Elastic

Remediation

The sources list no fixed version for Elasticsearch. Red Hat lists Red Hat OpenShift AI (RHOAI) as affected, with no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Not affected: 1 product
  • Red Hat Quay 3

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-115290
  2. 2026-11-03 CISA SSVC decision points changed
  3. 2026-11-03 Priority changed: MEDIUM → LOW
  4. 2026-11-03 Alias added: GHSA-6f4f-c5j2-2rrx
  5. 2026-11-04 Affected versions changed · Red Hat
  6. 2026-11-04 CVSS score added · Red Hat
  7. 2026-11-06 Affected versions changed · Red Hat

References

Other 1

  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2015-01295 The Groovy scripting engine in Elasticsearch before 1.3.8 and 1.4.x before 1.4.3 allows… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-02491 The default configuration in Elasticsearch before 1.2 enables dynamic scripting, which… KEVCVSS 3.1HIGH 8.1
  • TI-2018-12328 Kibana versions before 6.4.3 and 5.6.13 contain an arbitrary file inclusion flaw in the… CVSS 3.0CRITICAL 9.8
  • TI-2023-15037 Elasticsearch StackOverflow vulnerability CVSS 3.1HIGH 7.5
  • TI-2021-05135 Information disclosure in Elasticsearch CVSS 3.1MEDIUM 6.5
See all 414 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences