TI-2026-21422 Aliases CVE-2026-26935 GHSA-5rmp-wvrc-g6g5

Improper Input Validation in Kibana Leading to Denial of Service

LOW 33CWE-20Published 2026-02-26 · Updated 2026-02-26

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00319 25th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Elastic	Kibana	9.3.0 – 9.3.0; 8.4.0 – 8.19.11; 9.0.0 – 9.2.5	—	No fix listed	CNA

Kibana VendorElastic Affected 9.3.0 – 9.3.0; 8.4.0 – 8.19.11; 9.0.0 – 9.2.5 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:elastic:kibana::::::::	8.4.0 to before 8.19.12; 9.0.0 to before 9.2.6	Vulnerable	Elastic
cpe:2.3:a:elastic:kibana:9.3.0:::::::*	9.3.0	Vulnerable	Elastic

cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:* Versions 8.4.0 to before 8.19.12; 9.0.0 to before 9.2.6 Vulnerable ·Elastic
cpe:2.3:a:elastic:kibana:9.3.0:*:*:*:*:*:*:* Versions 9.3.0 Vulnerable ·Elastic

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-26935
2026-10-03 Alias added: GHSA-5rmp-wvrc-g6g5

References

Advisory 1

https://discuss.elastic.co/t/kibana-8-19-12-9-2-6-9-3-1-security-update-esa-2026-13/385249

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