CVE-2026-74040CWE-862broken-access-control

CVE-2026-74040

Critical · published October 13, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
45.3
In the wild
Unconfirmed
What it is

Wazuh versions from 3.9.0 before 4.14.8 contain an arbitrary file overwrite vulnerability in MasterHandler.process_files_from_worker allowing a cluster worker to overwrite protected master files. Attackers controlling a worker can use a trailing-slash basename bypass and missing extra_valid enforcement to overwrite ossec.conf and agent.conf, achieving root remote code execution across the manager and every agent.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
9.4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.00552 · 45.3th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-10-13T18:17Z
References (4)
https://github.com/wazuh/wazuh/releases/tag/v4.14.8 · [email protected]https://github.com/wazuh/wazuh/security/advisories/GHSA-88p6-7cm8-xwj8 · [email protected]https://www.vulncheck.com/advisories/wazuh-3.9.0-before-4.14.8-arbitrary-file-overwrite-rce-via-process-files-from-worker · [email protected]https://github.com/wazuh/wazuh/security/advisories/GHSA-88p6-7cm8-xwj8 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 OCT 03:34Z
    EPSS moved — → 1%
    epss
  • 13 OCT 13:27Z
    Wazuh 3.9.0 before 4.14.8 Arbitrary File Overwrite RCE via process_files_from_worker
    cvelistv5
  • 13 OCT 13:27Z
    Wazuh 3.9.0 before 4.14.8 Arbitrary File Overwrite RCE via process_files_from_worker
    cvelistv5