7.8

CVE-2026-78604: elastic elastic_agent

CVSS: 7.8v3.1HighAnalyzed
AliasesCGA-fvjc-hf89-gx69CGA-mm2r-pr4w-rm58CGA-qw72-mj5w-vm9m
Published 02-09-2026Last modified 03-09-2026
Open JSON

Vulnerability summary

CVE-2026-78604 is a high (CVSS 7.8) vulnerability in elastic elastic_agent. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.15%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-09-2026
    PublishedVulnerability first disclosed.
  2. 03-09-2026
    Last modifiedVulnerability information updated.

Description

Incorrect Permission Assignment for Critical Resource (CWE-732) in Elastic Agent can lead to local privilege escalation via Replace Binaries (CAPEC-642). On Windows systems where Elastic Agent is installed in unprivileged mode, resources used by the agent service are created with access controls broader than required. A local user could take advantage of this to cause the service to execute code of their choosing, ultimately obtaining SYSTEM-level privileges on the host.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

+0.05 pp

From 0.10% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.15%

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

Chainguard2 products
  • elastic-agent-9.2All versions (No fix recorded)
  • elastic-agent-9.3All versions (No fix recorded)
Elastic1 product
  • elastic_agent≥ 8.0.0, ≤ 8.19.20 | ≥ 9.0.0, ≤ 9.4.5 | ≥ 9.5.0, ≤ 9.5.1 | ≥ 8.0.0, < 8.19.21 | ≥ 9.0.0, < 9.4.6 | ≥ 9.5.0, < 9.5.2

2 vendors · 3 products

References

1 links