Eda-server: externaleventstreamviewset trusts subject header without validation and leaks expected dn (Red Hat Red Hat Ansible Automation Platform 2.5 for RHEL 8)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.28 % · percentile 20 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Awaiting Analysis
Description
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.
Weaknesses (CWE)
- CWE-345 — Insufficient Verification of Data Authenticity
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | redhat |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N | NVD · secalert@redhat.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-49406
- GCVE · GCVE-0-2026-12383
Affected products
| Product | Versions |
|---|---|
| Red Hat · Red Hat Ansible Automation Platform 2.5 for RHEL 8 | unaffected 0:1.1.21-1.el8ap < * |
| Red Hat · Red Hat Ansible Automation Platform 2.5 for RHEL 9 | unaffected 0:1.1.21-1.el9ap < * |
| Red Hat · Red Hat Ansible Automation Platform 2.6 for RHEL 9 | unaffected 0:1.2.11-1.el9ap < * |
| Red Hat · Red Hat Ansible Automation Platform 2.7 | unaffected 1785374869 < * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |