CVE-2026-49095 | Improper Input Validation in Kibana Fleet Leading to Privilege Escalation

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.

Published: 2026-05-28 Last update: 2026-06-01 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-49095 is rated Low Risk (33.8/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.07%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-49095

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-03 0.04% 0.07% +0.03%
2 2026-05-29 — 0.04% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-49095

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 1.2 5.2 [email protected]

Weakness enumeration for CVE-2026-49095

GitHub Security Advisory for CVE-2026-49095

GHSA-p9vc-h7rw-q6hq · Severity: medium — Improper Input Validation (CWE-20) in the Kibana Fleet agent policy management feature can lead...

Affected software / configurations for CVE-2026-49095

Vendor Product Version Raw CPE
elastic kibana >= 8.0.0, < 8.19.16 cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*
elastic kibana >= 9.0.0, < 9.3.5 cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*
elastic kibana >= 9.4.0, < 9.4.2 cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*

References for CVE-2026-49095

cvelogic Threat Intelligence