CVE-2026-12383

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:50319
https://access.redhat.com/errata/RHSA-2026:50336
https://access.redhat.com/errata/RHSA-2026:50340
https://access.redhat.com/security/cve/CVE-2026-12383
https://bugzilla.redhat.com/show_bug.cgi?id=2489127

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-27 19:17

Updated : 2026-08-04 21:16

NVD link : CVE-2026-12383

Mitre link : CVE-2026-12383

CVE.ORG link : CVE-2026-12383

JSON object : View

Products Affected

No product.

CWE

CWE-345

Insufficient Verification of Data Authenticity

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