Arbitrary File Read in Wazuh Agent Upgrade Mechanism
CVE-2026-74034

8.7HIGH

Key Information:

Vendor

Wazuh

Status
Wazuh-manager
Vendor
CVE Published:
13 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-74034?

Wazuh versions prior to 4.14.8 are affected by a vulnerability wherein the wm_agent_upgrade function lacks a proper origin check. This flaw enables enrolled agents to send upgrade_custom commands with a file_path controlled by an attacker. As a result, attackers can exploit this to inject messages through the agent channel, gaining unauthorized access to read sensitive files, including /etc/shadow and client.keys, which could lead to further system compromise.

Affected Version(s)

wazuh-manager 4.1.0 < 4.14.8

wazuh-manager 4.14.8

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

wazuh-unauth-chain
Created by roninreilly

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-r...
vendor-advisory
https://github.com/wazuh/wazuh/releases/tag/v4.14.8
patchrelease-notes
https://www.vulncheck.com/advisories/wazuh-4.1.0-before-4...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

kah-ja
vikman90
.