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CVE-2026-49095

Improper Input Validation in Kibana Fleet Leading to Privilege Escalation

Published: May 28, 2026Updated: Jun 1, 2026 Sources: CVE List NVDCWE-20
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.3%
Top 82.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Improper Input Validation (CWE-20) in the Kibana Fleet agent policy management feature can lead to privilege escalation. An authenticated user with Fleet management privileges can manipulate agent policy configuration by injecting values into a configuration override mechanism that is not adequately validated. An attacker can cause Elastic Agents to be issued API keys with elevated Elasticsearch privileges, potentially granting unauthorized read and write access to sensitive Elasticsearch security indices beyond what is intended for the Fleet management role.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-20

Affected Products

kibanaelasticDatabases
KibanaElasticDatabases
elasticcommercialUSDatabasesaka elasticsearch co., elastic.co

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
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References

https://discuss.elastic.co/t/kibana-fleet-8-19-16-9-3-5-and-9-4-2-security-update-esa-2026-38/386559
discuss.elastic.co

Timeline

Published
May 28, 2026
Last Updated
Jun 1, 2026

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