CVE-2026-45798

Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44	Patch
https://github.com/wazuh/wazuh/pull/36059	Issue Tracking Patch
https://github.com/wazuh/wazuh/releases/tag/v4.14.6	Patch Release Notes
https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2	Patch Release Notes
https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:wazuh:wazuh::::::::
	cpe:2.3:a:wazuh:wazuh:5.0.0:beta1::::::

History

No history.

Information

Published : 2026-08-19 17:18

Updated : 2026-09-15 19:25

NVD link : CVE-2026-45798

Mitre link : CVE-2026-45798

CVE.ORG link : CVE-2026-45798

JSON object : View

Products Affected

wazuh

wazuh

CWE

CWE-121

Stack-based Buffer Overflow

CWE-170

Improper Null Termination

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