{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/event-driven-ansible/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.5,"id":"CVE-2026-12383"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Event-Driven Ansible"],"_cs_severities":["high"],"_cs_tags":["vulnerability","network","ansible"],"_cs_type":"advisory","_cs_vendors":["Red Hat"],"content_html":"\u003cp\u003eA high-severity vulnerability, CVE-2026-12383, has been identified in the Red Hat Event-Driven Ansible (EDA) server, specifically within the \u003ccode\u003eExternalEventStreamViewSet\u003c/code\u003e component. This flaw stems from overly permissive access controls, utilizing \u003ccode\u003epermission_classes=[AllowAny]\u003c/code\u003e and \u003ccode\u003eauthentication_classes=[]\u003c/code\u003e, which negates proper authentication checks. The system relies solely on the \u003ccode\u003eSubject\u003c/code\u003e HTTP header for mTLS authentication without verifying that this header originates from a trusted proxy. An unauthenticated attacker capable of reaching the EDA API endpoint can craft a request with a spoofed \u003ccode\u003eSubject\u003c/code\u003e header to bypass mTLS, inject arbitrary events into normally protected event streams, and consequently trigger downstream automation actions. Furthermore, the vulnerability leaks the expected certificate Distinguished Name (DN) within 403 error responses, providing valuable information to potential attackers. This allows for unauthorized control over automated processes and sensitive data exposure.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a publicly accessible Event-Driven Ansible (EDA) API endpoint, specifically targeting the \u003ccode\u003eExternalEventStreamViewSet\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts an HTTP POST request designed to interact with the EDA API.\u003c/li\u003e\n\u003cli\u003eThe attacker researches the expected format for certificate Distinguished Names (DNs), potentially utilizing the DN leakage vulnerability if a 403 error was previously observed.\u003c/li\u003e\n\u003cli\u003eThe attacker forges a \u003ccode\u003eSubject\u003c/code\u003e HTTP header in their request, embedding a spoofed Distinguished Name value to impersonate a trusted mTLS client.\u003c/li\u003e\n\u003cli\u003eArbitrary event data is constructed and included in the body of the crafted HTTP POST request.\u003c/li\u003e\n\u003cli\u003eThe attacker sends the malicious request to the vulnerable EDA API endpoint (\u003ccode\u003e/api/v1/externaleventstreams/\u003c/code\u003e).\u003c/li\u003e\n\u003cli\u003eDue to permissive access controls and lack of \u003ccode\u003eSubject\u003c/code\u003e header verification, the EDA server processes the request, bypassing mTLS authentication.\u003c/li\u003e\n\u003cli\u003eThe injected arbitrary event triggers configured downstream automation actions, potentially leading to unauthorized system changes, data manipulation, or arbitrary code execution.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-12383 allows an unauthenticated attacker to gain unauthorized control over Event-Driven Ansible automation. By injecting arbitrary events, attackers can trigger any downstream automation actions configured within the EDA server, potentially leading to significant system compromise, data exfiltration, or denial of service, depending on the scope and privileges of the automated tasks. The vulnerability also leaks sensitive information, specifically the expected certificate Distinguished Name, in 403 error responses, which can aid further reconnaissance and exploitation attempts. With a CVSS v3.1 Base Score of 7.5, the impact is considered high, representing a critical risk to systems relying on EDA for automation.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePatch CVE-2026-12383 by updating your Red Hat Event-Driven Ansible server to the latest secure version immediately.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026quot;Detect CVE-2026-12383 Exploitation Attempt - Spoofed Subject Header\u0026quot; to your SIEM to alert on suspicious requests to the \u003ccode\u003eExternalEventStreamViewSet\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eReview webserver access logs for \u003ccode\u003ecs-uri-stem\u003c/code\u003e values starting with \u003ccode\u003e/api/v1/externaleventstreams/\u003c/code\u003e combined with unusual \u003ccode\u003ecs-header-subject\u003c/code\u003e values or HTTP POST methods.\u003c/li\u003e\n\u003cli\u003eAudit your EDA server configurations for the \u003ccode\u003eExternalEventStreamViewSet\u003c/code\u003e to ensure appropriate authentication and authorization mechanisms are enforced.\u003c/li\u003e\n\u003cli\u003eMonitor webserver error logs for 403 HTTP status codes (\u003ccode\u003esc-status: \u0026quot;403\u0026quot;\u003c/code\u003e) to the \u003ccode\u003e/api/v1/externaleventstreams/\u003c/code\u003e path and examine the response body for mentions of certificate Distinguished Names, which indicates information leakage.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-27T19:45:46Z","date_published":"2026-07-27T19:45:46Z","id":"https://feed.craftedsignal.io/briefs/2026-07-cve-2026-12383-eda-server/","summary":"A flaw in the Event-Driven Ansible (EDA) server's ExternalEventStreamViewSet allows an unauthenticated attacker to bypass mTLS authentication by spoofing the Subject HTTP header, enabling injection of arbitrary events into mTLS-protected streams and triggering downstream automation actions, while also leaking the expected certificate Distinguished Name in 403 error responses.","title":"CVE-2026-12383: Event-Driven Ansible Server Authentication Bypass","url":"https://feed.craftedsignal.io/briefs/2026-07-cve-2026-12383-eda-server/"}],"language":"en","title":"CraftedSignal Threat Feed - Event-Driven Ansible","version":"https://jsonfeed.org/version/1.1"}