CVE-2026-26204
- Source
- https://cve.org/CVERecord?id=CVE-2026-26204
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26204.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-26204
- Aliases
-
- GHSA-j4c7-hwjw-8857
- Published
- 2026-04-29T17:43:44Z
- Modified
- 2026-10-28T02:30:21Z
- Severity
-
- 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Wazuh: Heap-based NULL WRITE Buffer Underflow in GetAlertData
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-124", "CWE-191" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26204.json" }- References
Affected packages
Git / github.com/wazuh/wazuh
Affected ranges
- Type
- GIT
- Repo
- https://github.com/wazuh/wazuh
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "1.0.0" }, { "fixed": "4.14.4" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "original_tag": "v4.14.4", "range": [ { "fixed": "5933ec9ebee76fb2546e5f7fc9f3a27d0aeca605" } ], "source": "REFERENCES_TAG" }, { "cpe": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*", "range": [ { "introduced": "1.0.0" }, { "fixed": "4.14.4" } ], "source": "CPE_RANGE" } ] }