CVE-2026-74034: Wazuh 4.1.0 before 4.14.8 Arbitrary File Read via upgrade_custom Command

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-13 · updated 2026-10-15
Weakness: CWE-862

Description

Wazuh from 4.1.0 before 4.14.8 contains a missing origin check in wm_agent_upgrade that allows enrolled agents to issue upgrade_custom commands with attacker-controlled file_path. Attackers can inject an upgrade_custom message over the agent channel to read arbitrary files as root, exfiltrating /etc/shadow and client.keys.

Affected products

wazuh: from 4.1.0 before 4.14.8 — fixed in 4.14.8

How to fix

Upgrade to a fixed version: wazuh 4.14.8. Check the vendor advisory for mitigations.

References

https://github.com/wazuh/wazuh/releases/tag/v4.14.8
https://github.com/wazuh/wazuh/security/advisories/GHSA-r7hm-43xr-477j
https://www.vulncheck.com/advisories/wazuh-4.1.0-before-4.14.8-arbitrary-file-read-via-upgrade-custom-command
https://github.com/wazuh/wazuh/security/advisories/GHSA-r7hm-43xr-477j

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