{"id":"CVE-2026-112334","kind":"vulnerability","aliases":["CVE-2026-112334"],"related":[],"title":"Wazuh: active-response config overflow in wazuh-execd corrupts root memory","description":"Wazuh from 1.0.0 before 4.14.9 contains an out-of-bounds write vulnerability in wazuh-execd that allows privileged manager-configuration attackers to corrupt root process memory via excess ar.conf entries. Attackers controlling ossec.conf active-response blocks can push over 64 commands to agents, overflowing ReadExecConfig() arrays and crashing Active Response fleet-wide.","summary":"Wazuh before 4.14.9 has an out-of-bounds write in wazuh-execd: more than 64 active-response commands in ossec.conf overflow an array in ReadExecConfig(). An attacker who already controls the manager configuration can corrupt root process memory and crash Active Response across the fleet.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["infrastructure","self-hosted","siem","wazuh"],"not_affected_if":["no-active-response","restricted-config-access","wazuh-4.14.9-or-later"],"how_to_check":"- Check the Wazuh manager version: `/var/ossec/bin/wazuh-control info` or the installed package version\n- Review `ossec.conf` active-response blocks for an unusually large number of command entries\n- Check the Wazuh release notes linked from the advisory for the list of affected builds","fix":"- Wazuh: move to `4.14.9` or later","status":"open","published_at":"2026-11-06T15:17:07+00:00","first_seen_at":"2026-11-06T15:42:43+00:00","triaged_at":"2026-11-06T15:44:25+00:00","updated_at":"2026-11-06T15:44:25+00:00","category":"infrastructure","confidence":0.7,"triage":{"at":"2026-11-06T15:44:25Z","model":"claude-haiku-5-5","output":{"fix":"- Wazuh: move to `4.14.9` or later","reach":"local","title":"Wazuh: active-response config overflow in wazuh-execd corrupts root memory","impact":"high","summary":"Wazuh before 4.14.9 has an out-of-bounds write in wazuh-execd: more than 64 active-response commands in ossec.conf overflow an array in ReadExecConfig(). An attacker who already controls the manager configuration can corrupt root process memory and crash Active Response across the fleet.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["wazuh","self-hosted","siem"],"confidence":0.7,"fix_status":"available","needs_auth":"yes","worst_case":"Root process memory corrupted; Active Response crashes across the fleet","analyst_note":"Confirm the exact affected range and fixed version against the vendor advisory and NVD entry, since the NVD text is the only detailed source here.","how_to_check":"- Check the Wazuh manager version: `/var/ossec/bin/wazuh-control info` or the installed package version\n- Review `ossec.conf` active-response blocks for an unusually large number of command entries\n- Check the Wazuh release notes linked from the advisory for the list of affected builds","plain_action":"","needs_analyst":true,"not_affected_if":["wazuh-4.14.9-or-later","no-active-response","restricted-config-access"],"who_is_affected":"Teams running a Wazuh manager from 1.0.0 up to but not including 4.14.9. The attacker needs control over the manager's ossec.conf, so exposure depends on who can edit manager configuration; installations where only trusted administrators write that file are lower risk. Systems that do not use Active Response are not affected by the crash path.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000756,"input_tokens":4335,"output_tokens":645,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-112334':16A,19A '-2026':15A,18A '1.0.0':76C '4.14.9':28B,78C '64':42B,117C 'across':71B 'activ':3A,44B,69B,111C,126C 'active-respons':2A,43B,110C 'agent':120C 'allow':92C 'alreadi':57B 'ar.conf':105C 'array':51B,123C 'attack':55B,97C,107C 'block':113C 'bound':34B,84C 'command':46B,118C 'config':5A 'configur':61B,96C 'contain':79C 'control':58B,108C 'corrupt':11A,63B,99C 'crash':68B,125C 'cve':14A,17A 'entri':106C 'excess':104C 'execd':10A,39B,90C 'fleet':73B,129C 'fleet-wid':128C 'host':23B 'infrastructur':20B 'manag':60B,95C 'manager-configur':94C 'memori':13A,66B,102C 'ossec.conf':48B,109C 'out-of-bound':31B,81C 'overflow':6A,49B,121C 'privileg':93C 'process':65B,101C 'push':115C 'readexecconfig':53B,122C 'respons':4A,45B,70B,112C,127C 'root':12A,64B,100C 'self':22B 'self-host':21B 'siem':24B 'via':103C 'vulner':86C 'wazuh':1A,9A,25B,26B,38B,74C,89C 'wazuh-execd':8A,37B,88C 'wide':130C 'write':35B,85C","nicknames":[],"mitigations":[],"who_affected":"Teams running a Wazuh manager from 1.0.0 up to but not including 4.14.9. The attacker needs control over the manager's ossec.conf, so exposure depends on who can edit manager configuration; installations where only trusted administrators write that file are lower risk. Systems that do not use Active Response are not affected by the crash path.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["infrastructure","medium","selfhosted","siem","wazuh"],"campaign_type":null,"search_a":"'-112334':16A,19A '-2026':15A,18A 'activ':3A 'active-respons':2A 'config':5A 'corrupt':11A 'cve':14A,17A 'execd':10A 'memori':13A 'overflow':6A 'respons':4A 'root':12A 'wazuh':1A,9A 'wazuh-execd':8A","search_b":"'4.14.9':28B '64':42B 'across':71B 'activ':44B,69B 'active-respons':43B 'alreadi':57B 'array':51B 'attack':55B 'bound':34B 'command':46B 'configur':61B 'control':58B 'corrupt':63B 'crash':68B 'execd':39B 'fleet':73B 'host':23B 'infrastructur':20B 'manag':60B 'memori':66B 'ossec.conf':48B 'out-of-bound':31B 'overflow':49B 'process':65B 'readexecconfig':53B 'respons':45B,70B 'root':64B 'self':22B 'self-host':21B 'siem':24B 'wazuh':25B,26B,38B 'wazuh-execd':37B 'write':35B","search_c":"'1.0.0':76C '4.14.9':78C '64':117C 'activ':111C,126C 'active-respons':110C 'agent':120C 'allow':92C 'ar.conf':105C 'array':123C 'attack':97C,107C 'block':113C 'bound':84C 'command':118C 'configur':96C 'contain':79C 'control':108C 'corrupt':99C 'crash':125C 'entri':106C 'excess':104C 'execd':90C 'fleet':129C 'fleet-wid':128C 'manag':95C 'manager-configur':94C 'memori':102C 'ossec.conf':109C 'out-of-bound':81C 'overflow':121C 'privileg':93C 'process':101C 'push':115C 'readexecconfig':122C 'respons':112C,127C 'root':100C 'via':103C 'vulner':86C 'wazuh':74C,89C 'wazuh-execd':88C 'wide':130C 'write':85C","first_public_at":"2026-11-06T10:27:17+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-112334","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112334","severity":null,"published_at":"2026-11-06T15:17:07+00:00","modified_at":"2026-11-06T15:17:07+00:00","first_seen_at":"2026-11-06T15:42:43+00:00","fetched_at":"2026-11-06T15:42:43+00:00","note":null}],"documents":[{"id":87519,"url":"https://github.com/wazuh/wazuh/releases/tag/v4.14.9","title":"Release notes: github.com","kind":"release","source":"nvd","publisher":"vendor","text":null,"published_at":null,"relation":"fix","confidence":null,"note":"Release notes: github.com"},{"id":87520,"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-f4pj-j296-jwp2","title":"Vendor advisory: github.com","kind":"vendor","source":"nvd","publisher":"vendor","text":null,"published_at":"2026-11-06T10:27:17+00:00","relation":"advisory","confidence":null,"note":"Vendor advisory: github.com"},{"id":87521,"url":"https://www.vulncheck.com/advisories/wazuh-1.0.0-before-4.14.9-out-of-bounds-write-in-wazuh-execd-via-ar-conf","title":"Third-party advisory: www.vulncheck.com","kind":"advisory","source":"nvd","publisher":"research","text":null,"published_at":null,"relation":"advisory","confidence":null,"note":"Third-party advisory: www.vulncheck.com"}],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}