{"id":"CVE-2026-54084","summary":"Wazuh agent enrollment NULL pointer dereference via malformed manager response","details":"Wazuh is an open-source security platform providing unified XDR and SIEM protection for endpoints and cloud workloads. In versions 4.0.0 through 4.14.6, a malicious or man-in-the-middle enrollment manager can crash a Wazuh agent during enrollment by returning a malformed key response with fewer than four fields, causing a NULL pointer dereference. The  w_enrollment_process_agent_key()  routine splits the manager-provided key into four space-separated fields but does not verify that all fields are present before passing them to validators. Because OS_StrBreak() leaves missing trailing entries as NULL and OS_IsValidName() calls strlen() on its argument without a NULL check, a response such as  OSSEC K:'1'  reaches OS_IsValidName(NULL) and terminates the agent process. Since Wazuh permits enrollment against an unverified manager when no CA certificate is configured, an attacker operating a rogue manager or intercepting the enrollment flow can deterministically crash agents, resulting in denial of service. This issue is fixed in version 4.14.7.","aliases":["GHSA-ppc7-hj9v-vx39"],"modified":"2026-10-28T11:09:51.959735029Z","published":"2026-08-27T23:12:20.239Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-476"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54084.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54084.json"},{"type":"ADVISORY","url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-ppc7-hj9v-vx39"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54084"},{"type":"FIX","url":"https://github.com/wazuh/wazuh/commit/7dfbb4a292bc6ae8e3bb4c1982f687f35216a748"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wazuh/wazuh","events":[{"introduced":"8c2c62a6e9dcbcf2c792f7924e8cfdb26842820b"},{"fixed":"a42268a27c555d9348d5598fb8751eaf4c8e9024"},{"fixed":"7dfbb4a292bc6ae8e3bb4c1982f687f35216a748"}],"database_specific":{"extracted_events":[{"source":"CPE_RANGE","cpe":"cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*","range":[{"introduced":"4.0.0"},{"fixed":"4.14.7"}]},{"source":"REFERENCES_COMMIT","range":[{"fixed":"7dfbb4a292bc6ae8e3bb4c1982f687f35216a748"}]}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54084.json","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/wazuh/wazuh/commit/7dfbb4a292bc6ae8e3bb4c1982f687f35216a748","target":{"file":"src/shared/enrollment_op.c"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["49651447138169551309027989127800567584","175712961222131404451194529675739079117","230633435204466696847550787069002950767","4090990952687679871136198065714515900","41791073297518614982911438681108692677","20624907413992941520258066722104514790","109471608537974177973306592535270792349","283617830231340459734249120193205990179","314165651572574572381249008255871556497","51622842622349885749594001892740460595","338260253295559567820519179362529912223","325415045128075035391621905577140799418"]},"id":"CVE-2026-54084-21dbb439","signature_type":"Line"},{"deprecated":false,"digest":{"function_hash":"239491891976242512829887904098667508628","length":761},"id":"CVE-2026-54084-9c935ad4","signature_type":"Function","signature_version":"v1","source":"https://github.com/wazuh/wazuh/commit/7dfbb4a292bc6ae8e3bb4c1982f687f35216a748","target":{"file":"src/shared/enrollment_op.c","function":"w_enrollment_process_agent_key"}}],"vanir_signatures_modified":"2026-10-28T11:09:51Z"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H"}]}