GHSA-C4XF-FV75-HWXM
Vulnerability from github – Published: 2026-07-27 21:31 – Updated: 2026-08-04 21:30A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses permissive access controls (permission_classes=[AllowAny], authentication_classes=[]) and relies solely on the Subject HTTP header value for mTLS authentication without verifying that the header originated from a trusted proxy. Additionally, the expected certificate Distinguished Name is leaked in the 403 error response body. An attacker who can reach the EDA API endpoint with a spoofed Subject header can inject arbitrary events into mTLS-protected event streams, triggering downstream automation actions.
{
"affected": [],
"aliases": [
"CVE-2026-12383"
],
"database_specific": {
"cwe_ids": [
"CWE-345"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-27T19:17:14Z",
"severity": "HIGH"
},
"details": "A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses permissive access controls (permission_classes=[AllowAny], authentication_classes=[]) and relies solely on the Subject HTTP header value for mTLS authentication without verifying that the header originated from a trusted proxy. Additionally, the expected certificate Distinguished Name is leaked in the 403 error response body. An attacker who can reach the EDA API endpoint with a spoofed Subject header can inject arbitrary events into mTLS-protected event streams, triggering downstream automation actions.",
"id": "GHSA-c4xf-fv75-hwxm",
"modified": "2026-08-04T21:30:25Z",
"published": "2026-07-27T21:31:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12383"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:50319"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:50336"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2026:50340"
},
{
"type": "WEB",
"url": "https://access.redhat.com/security/cve/CVE-2026-12383"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489127"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
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