CVE-2026-44254Wazuh: Stack Out-of-Bounds Write in remoted Decompression Path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Wazuh is a free and open source platform used for threat prevention, detection, and response. From 1.0.0 until 4.14.6 and 5.0.0-beta2, HandleSecureMessage() in src/remoted/secure.c passes a pointer inside its stack buffer to ReadSecMSG(), and src/os_crypto/shared/msgs.c decompresses up to OS_MAXSTR bytes at that offset. For an encrypted agent message on TCP port 1514 that expands to 65,536 bytes, os_zlib_uncompress() writes a terminating null byte beyond the end of the destination buffer. The resulting stack out-of-bounds write in the root-level remoted daemon can crash message processing and disrupt agent communications. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-131, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wazuh wazuh wazuh:wazuh (from the name) | from 1.0.0, < 4.14.6; from 5.0.0-beta1, < 5.0.0-beta2 | CNA record |
wazuh wazuh wazuh:wazuh | from 1.0.0 before 4.14.6; 5.0.0 | NVD |
References
- https://github.com/wazuh/wazuh/security/advisories/GHSA-9wm4-fp6c-hqgqx-refsource-confirm, exploit, vendor-advisory
- https://github.com/wazuh/wazuh/pull/35773x-refsource-misc, issue-tracking, patch
- https://github.com/wazuh/wazuh/commit/96772487fbdecd43cc83e284ee7aeb45e3cfcd96x-refsource-misc, patch
- https://github.com/wazuh/wazuh/releases/tag/v4.14.6x-refsource-misc, release-notes
- https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.