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TI-2026-21423 Aliases CVE-2026-26936GHSA-rr4q-h87q-gm3v

Inefficient Regular Expression Complexity in Kibana Leading to Denial of Service

Priority LOW 33CWE-1333Published · 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 · NVD. Fix status from CNA. Impact type from CWE-1333.

Summary

Inefficient Regular Expression Complexity (CWE-1333) in the AI Inference Anonymization Engine in Kibana can lead Denial of Service via Regular Expression Exponential Blowup (CAPEC-492).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00373 31st 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
No
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
ElasticKibana9.0.0 – 9.2.4; 8.0.0 – 8.19.10—No fix listedCNA
  • Kibana VendorElastic Affected 9.0.0 – 9.2.4; 8.0.0 – 8.19.10 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*8.0.0 to before 8.19.11; 9.0.0 to before 9.2.5VulnerableElastic
  • cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.19.11; 9.0.0 to before 9.2.5 Vulnerable ·Elastic

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26936
  2. 2026-10-03 Alias added: GHSA-rr4q-h87q-gm3v

References

Advisory 1

  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • 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-2025-18692 Kibana arbitrary code execution via prototype pollution CVSS 3.1CRITICAL 9.8
  • TI-2020-05660 Code injection in Elastic Kibana CVSS 3.1HIGH 8.8
  • TI-2024-24803 Deserialization of untrusted data in Elastic Kibana CVSS 3.1CRITICAL 9.9
  • TI-2024-24800 Kibana arbitrary code execution via YAML deserialization CVSS 3.1CRITICAL 9.1
See all 188 →

Sources

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