Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-61800

CVE-2026-61800CRITICAL

Wazuh cluster worker file sync allows arbitrary file write under /var/ossec (incomplete fix for CVE-2026-30893)

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   H   N  C  H  H  H    9.1   .0098   60.8     —

AFFECTED
  Product  Versions              Fixed
  wazuh    >= 4.4.0, < 4.14.7 –  —

TIMELINE
  Jul 10  Reserved by GitHub_M
  Aug 27  Published (CNA: GitHub_M)
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-61800 (wazuh). Public exploit reference added.

CWE-22 · CNA: GitHub_M · CVSS v3.1 · 2 references · NVD status: Analyzed

Description

Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. In versions 4.4.0 through 4.14.6, a party holding the cluster key can write, overwrite, or delete arbitrary files under /var/ossec on worker nodes, leading to remote code execution as root. During cluster file synchronization, the non-merged branch of update_master_files_in_worker() moves each staged file to a destination derived only from safe_join(), which confines the path to /var/ossec but never verifies that the file lands in the directory declared by its cluster_item_key. Because the destination check present on the primary node and on the worker's merged branch was not applied, a peer can place files at attacker-chosen locations under /var/ossec, including paths that are executed as root, and the delete branch has the same gap. This is an incomplete fix for CVE-2026-30893, which addressed traversal outside /var/ossec but left this path able to redirect files anywhere within it. This issue is fixed in version 4.14.7.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 10, 2026	Reserved	Reserved by GitHub_M
August 27, 2026	Published	Published (CNA: GitHub_M)
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-61800 (wazuh). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
wazuh	wazuh	—	>= 4.4.0, < 4.14.7	—

Weaknesses

CWE-22

References (2)

https://github.com/wazuh/wazuh/commit/f7f7c4d2d9e683c5d42e997fe7028a3fb2578853 [Patch]
https://github.com/wazuh/wazuh/security/advisories/GHSA-3jff-488g-335f [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-61800 at cve.org

Vendors: wazuh

Weaknesses: CWE-22

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-61800 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.