CVEvulnerability

CVE-2026-26204

5.5 MEDIUM Published 2026-04-29 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-04-29
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.4 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-124, CWE-191

Description

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 1.0.0 to before version 4.14.4, a heap-based out-of-bounds WRITE occurs in GetAlertData, resulting in writing a NULL byte exactly 1 byte before the start of the buffer allocated by strdup. Due to unsigned integer underflow and pointer arithmetic wrapping, the write lands at offset -1 from the buffer, corrupting heap metadata. A malicious actor can potentially leverage this issue through a compromised agent to cause denial of service or heap corruption by injecting a specially crafted alert into the alerts log file monitored by wazuh-logcollector. This issue has been patched in version 4.14.4.

Affected configurations

• wazuh wazuh (>= 1.0.0 < 4.14.4)

Related

Weakness · CWE (2)

  • CWE-124 Buffer Underwrite weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound) weakness

References