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CVE-2026-45798

Wazuh: Pre-auth stack-buffer-overflow in compare_wazuh_versions reachable from wazuh-authd (TCP/1515) via crafted enrollment V: field PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
wazuh / wazuhaffected >= 4.5.0, < 4.14.6; affected >= 5.0.0-beta1, < 5.0.0-beta2

CWE

CWE-121, CWE-170

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.