CVE-2026-74039CWE-1333CWE-770denial-of-service

CVE-2026-74039

Medium · published August 18, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
45.5
In the wild
Unconfirmed
What it is

Wazuh 4.0.0 before 4.14.7 and 5.0.0-beta2 contain a denial of service vulnerability that allows authenticated attackers with allow_run_as enabled to exhaust CPU resources by submitting arbitrarily deeply nested JSON structures to the POST /security/user/authenticate/run_as endpoint. Attackers can repeatedly submit malformed auth_context bodies with unlimited nesting depth to cause the API framework to consume excessive CPU, denying service to all other API consumers.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00555 · 45.5th percentile
Weaknesses
CWE-1333 · Inefficient Regular Expression Complexity; CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-08-18T22:19Z
Affected products (3)
ProductVersionsFixed in
wazuh/wazuh≥ 4.0.0, < 4.14.74.14.7
wazuh/wazuhall versions—
wazuh/wazuhall versions—
References (4)
https://github.com/wazuh/wazuh/pull/37034 · [email protected]https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q · [email protected]https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-context · [email protected]https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 AUG 17:26Z
    Wazuh 4.0.0 < 4.14.7 API DoS via Deeply Nested JSON auth_context
    cvelistv5