9.1

CVE-2026-72676: elastic fleet_server Code Injection

CVSS: 9.1v3.1CriticalAnalyzed
Published 13-08-2026Last modified 13-08-2026
Open JSON

Vulnerability summary

CVE-2026-72676 is a critical (CVSS 9.1) Code Injection vulnerability in elastic fleet_server. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 44.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (NVD)
EPSS score
0.55%
0%100%
Low · +0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 13-08-2026
    Last modifiedVulnerability information updated.

Description

Improper Control of Generation of Code ('Code Injection') (CWE-94) in Fleet Server can lead to the execution of attacker-supplied script content via Code Injection (CAPEC-242). Kibana accepted an identifier for an output configuration without restricting it to safe characters. That identifier is later placed into a server-side script that Fleet Server builds as part of routine agent policy processing, so script syntax embedded in the identifier became part of the script that was executed rather than being treated as data.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

+0.16 pp

From 0.39% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.55%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Elastic2 products
  • fleet_server≥ 8.5.0, ≤ 8.19.19 | ≥ 9.0.0, ≤ 9.4.4 | 9.5.0
  • kibana≥ 8.5.0, < 8.19.20 | ≥ 9.0.0, < 9.4.5 | 9.5.0

1 vendor · 2 products

References

1 links