CVE-2026-33754 json
Wazuh: Unauthenticated cluster packet length leads to uncontrolled memory allocation (remote DoS)
published 2026-07-16 3 mo ago modified 2026-07-20 3 mo ago also EUVD-2026-45077
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
Wazuh is a free and open source platform used for threat prevention, detection, and response. In versions 3.9.0 and above, prior to 4.14.5, a remote attacker can trigger memory exhaustion in the cluster protocol parser by sending a crafted message header with an arbitrarily large payload length. The length is trusted before authentication/decryption and used directly to allocate memory, allowing unauthenticated denial of service of the cluster service. This issue has been fixed in version 4.14.5.
Patch / fix
- wazuh wazuh 4.14.5
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/wazuh/wazuh/security/advisories/GHSA-476v-28pp-5wg9 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- wazuh wazuh
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
github.com
/wazuh/wazuh/security/advisories/GHSA-476v-28pp-5wg9
exploit, vendor-advisory
Sources
- CVE List CVE-2026-33754
- NVD CVE-2026-33754
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