CVE-2026-12383

Eda-server: externaleventstreamviewset trusts subject header without validation and leaks expected dn

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

0.28%Up 0.2 points since Jul 28, 2026

What each source reports

CVE List Score used 7.5

Eda-server: externaleventstreamviewset trusts subject header without validation and leaks expected dn

Record: CVE-2026-12383
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-345
Updated: 2026-11-02

EUVDEUVD-2026-49406 7.5

Record: EUVD-2026-49406
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-c4xf-fv75-hwxm 7.5

A flaw was found in the Event-Driven Ansible (EDA) server. The ExternalEventStreamViewSet uses...

Record: GHSA-c4xf-fv75-hwxm
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-345
Updated: 2026-11-02

NVD 7.5

Record: CVE-2026-12383
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-345
Updated: 2026-11-02

OSVRHSA-2026:50319 8.2

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update

Record: RHSA-2026:50319
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Updated: 2026-11-02

OSVRHSA-2026:50336 8.2

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update

Record: RHSA-2026:50336
CVSS 3.1: 8.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`automation-eda-controller` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.1.21-1.el8ap	0:1.1.21-1.el8ap
`automation-eda-controller-base` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.1.21-1.el8ap	0:1.1.21-1.el8ap
`automation-eda-controller-base-services` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.1.21-1.el8ap	0:1.1.21-1.el8ap
`automation-eda-controller-event-stream-services` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.1.21-1.el8ap	0:1.1.21-1.el8ap
`automation-eda-controller-worker-services` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.1.21-1.el8ap	0:1.1.21-1.el8ap
`automation-eda-controller` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.1.21-1.el9ap	0:1.1.21-1.el9ap
`automation-eda-controller-base` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.1.21-1.el9ap	0:1.1.21-1.el9ap
`automation-eda-controller-base-services` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.1.21-1.el9ap	0:1.1.21-1.el9ap
`automation-eda-controller-event-stream-services` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.1.21-1.el9ap	0:1.1.21-1.el9ap
`automation-eda-controller-worker-services` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.1.21-1.el9ap	0:1.1.21-1.el9ap

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Affected packages
Package	Affected	Fixed
`receptor` Red Hat:ansible_automation_platform_developer:2.5::el8	before 0:1.6.7-1.el8ap	0:1.6.7-1.el8ap
`receptor` Red Hat:ansible_automation_platform_inside:2.5::el8	before 0:1.6.7-1.el8ap	0:1.6.7-1.el8ap
`receptor` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.6.7-1.el8ap	0:1.6.7-1.el8ap
`receptor` Red Hat:ansible_automation_platform_developer:2.5::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptor` Red Hat:ansible_automation_platform_inside:2.5::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptor` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`automation-gateway-proxy-server` Red Hat:ansible_automation_platform:2.5::el8	before 0:2.5.10-7.el8ap	0:2.5.10-7.el8ap
`automation-gateway-proxy-server` Red Hat:ansible_automation_platform:2.5::el9	before 0:2.6.17-2.el9ap	0:2.6.17-2.el9ap
`python3.12-aiohttp` Red Hat:ansible_automation_platform:2.5::el8	before 0:3.14.1-2.el8ap	0:3.14.1-2.el8ap
`python3.12-aiohttp` Red Hat:ansible_automation_platform:2.5::el9	before 0:3.14.1-2.el9ap	0:3.14.1-2.el9ap
`automation-gateway-proxy` Red Hat:ansible_automation_platform:2.5::el8	before 0:2.5.10-7.el8ap	0:2.5.10-7.el8ap
`automation-gateway-proxy-debugsource` Red Hat:ansible_automation_platform:2.5::el8	before 0:2.5.10-7.el8ap	0:2.5.10-7.el8ap
`automation-gateway-proxy-server-debuginfo` Red Hat:ansible_automation_platform:2.5::el8	before 0:2.5.10-7.el8ap	0:2.5.10-7.el8ap
`automation-gateway-proxy` Red Hat:ansible_automation_platform:2.5::el9	before 0:2.6.17-2.el9ap	0:2.6.17-2.el9ap
`automation-gateway-proxy-debugsource` Red Hat:ansible_automation_platform:2.5::el9	before 0:2.6.17-2.el9ap	0:2.6.17-2.el9ap
`automation-gateway-proxy-server-debuginfo` Red Hat:ansible_automation_platform:2.5::el9	before 0:2.6.17-2.el9ap	0:2.6.17-2.el9ap
`receptorctl` Red Hat:ansible_automation_platform_developer:2.5::el8	before 0:1.6.7-1.el8ap	0:1.6.7-1.el8ap
`receptorctl` Red Hat:ansible_automation_platform_inside:2.5::el8	before 0:1.6.7-1.el8ap	0:1.6.7-1.el8ap
`receptor-debuginfo` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.6.7-1.el8ap	0:1.6.7-1.el8ap
`receptor-debugsource` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.6.7-1.el8ap	0:1.6.7-1.el8ap
`receptorctl` Red Hat:ansible_automation_platform:2.5::el8	before 0:1.6.7-1.el8ap	0:1.6.7-1.el8ap
`receptorctl` Red Hat:ansible_automation_platform_developer:2.5::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptorctl` Red Hat:ansible_automation_platform_inside:2.5::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptor-debuginfo` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptor-debugsource` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptorctl` Red Hat:ansible_automation_platform:2.5::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`python3.12-daphne` Red Hat:ansible_automation_platform:2.5::el8	before 0:4.2.2-1.el8ap	0:4.2.2-1.el8ap
`python3.12-daphne` Red Hat:ansible_automation_platform:2.5::el9	before 0:4.2.2-1.el9ap	0:4.2.2-1.el9ap
`automation-controller-venv-tower` Red Hat:ansible_automation_platform:2.5::el8	before 0:4.6.31-1.el8ap	0:4.6.31-1.el8ap
`automation-controller-venv-tower` Red Hat:ansible_automation_platform:2.5::el9	before 0:4.6.31-1.el9ap	0:4.6.31-1.el9ap
`python3.12-pillow` Red Hat:ansible_automation_platform:2.5::el8	before 0:12.3.0-1.el8ap	0:12.3.0-1.el8ap
`python3.12-pillow` Red Hat:ansible_automation_platform:2.5::el9	before 0:12.3.0-1.el9ap	0:12.3.0-1.el9ap
`python3.12-pyasn1` Red Hat:ansible_automation_platform:2.5::el8	before 0:0.6.4-1.el8ap	0:0.6.4-1.el8ap
`python3.12-pyasn1` Red Hat:ansible_automation_platform:2.5::el9	before 0:0.6.4-1.el9ap	0:0.6.4-1.el9ap
`automation-eda-controller` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.2.11-1.el9ap	0:1.2.11-1.el9ap
`automation-eda-controller-base` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.2.11-1.el9ap	0:1.2.11-1.el9ap
`automation-eda-controller-base-services` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.2.11-1.el9ap	0:1.2.11-1.el9ap
`automation-eda-controller-event-stream-services` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.2.11-1.el9ap	0:1.2.11-1.el9ap
`automation-eda-controller-worker-services` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.2.11-1.el9ap	0:1.2.11-1.el9ap
`automation-gateway-proxy` Red Hat:ansible_automation_platform:2.6::el9	before 0:2.6.17-2.el9ap	0:2.6.17-2.el9ap
`automation-gateway-proxy-debugsource` Red Hat:ansible_automation_platform:2.6::el9	before 0:2.6.17-2.el9ap	0:2.6.17-2.el9ap
`automation-gateway-proxy-server` Red Hat:ansible_automation_platform:2.6::el9	before 0:2.6.17-2.el9ap	0:2.6.17-2.el9ap
`automation-gateway-proxy-server-debuginfo` Red Hat:ansible_automation_platform:2.6::el9	before 0:2.6.17-2.el9ap	0:2.6.17-2.el9ap
`python3.12-aiohttp` Red Hat:ansible_automation_platform:2.6::el9	before 0:3.14.1-2.el9ap	0:3.14.1-2.el9ap
`python3.12-aiohttp-debuginfo` Red Hat:ansible_automation_platform:2.6::el9	before 0:3.14.1-2.el9ap	0:3.14.1-2.el9ap
`python3.12-aiohttp-debugsource` Red Hat:ansible_automation_platform:2.6::el9	before 0:3.14.1-2.el9ap	0:3.14.1-2.el9ap
`receptor` Red Hat:ansible_automation_platform:2.6::el10	before 0:1.6.7-1.el10ap	0:1.6.7-1.el10ap
`receptor-debuginfo` Red Hat:ansible_automation_platform:2.6::el10	before 0:1.6.7-1.el10ap	0:1.6.7-1.el10ap
`receptor-debugsource` Red Hat:ansible_automation_platform:2.6::el10	before 0:1.6.7-1.el10ap	0:1.6.7-1.el10ap
`receptorctl` Red Hat:ansible_automation_platform:2.6::el10	before 0:1.6.7-1.el10ap	0:1.6.7-1.el10ap
`receptor` Red Hat:ansible_automation_platform_developer:2.6::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptorctl` Red Hat:ansible_automation_platform_developer:2.6::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptor` Red Hat:ansible_automation_platform_inside:2.6::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptorctl` Red Hat:ansible_automation_platform_inside:2.6::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptor` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptor-debuginfo` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptor-debugsource` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`receptorctl` Red Hat:ansible_automation_platform:2.6::el9	before 0:1.6.7-1.el9ap	0:1.6.7-1.el9ap
`python3.12-daphne` Red Hat:ansible_automation_platform:2.6::el9	before 0:4.2.2-1.el9ap	0:4.2.2-1.el9ap
`automation-controller` Red Hat:ansible_automation_platform_developer:2.6::el9	before 0:4.7.15-2.el9ap	0:4.7.15-2.el9ap
`automation-controller-cli` Red Hat:ansible_automation_platform_developer:2.6::el9	before 0:4.7.15-2.el9ap	0:4.7.15-2.el9ap
`automation-controller` Red Hat:ansible_automation_platform:2.6::el9	before 0:4.7.15-2.el9ap	0:4.7.15-2.el9ap
`automation-controller-cli` Red Hat:ansible_automation_platform:2.6::el9	before 0:4.7.15-2.el9ap	0:4.7.15-2.el9ap
`automation-controller-server` Red Hat:ansible_automation_platform:2.6::el9	before 0:4.7.15-2.el9ap	0:4.7.15-2.el9ap
`automation-controller-ui` Red Hat:ansible_automation_platform:2.6::el9	before 0:4.7.15-2.el9ap	0:4.7.15-2.el9ap
`automation-controller-venv-tower` Red Hat:ansible_automation_platform:2.6::el9	before 0:4.7.15-2.el9ap	0:4.7.15-2.el9ap
`python3.12-pillow` Red Hat:ansible_automation_platform:2.6::el9	before 0:12.3.0-1.el9ap	0:12.3.0-1.el9ap
`python3.12-pillow-debuginfo` Red Hat:ansible_automation_platform:2.6::el9	before 0:12.3.0-1.el9ap	0:12.3.0-1.el9ap
`python3.12-pillow-debugsource` Red Hat:ansible_automation_platform:2.6::el9	before 0:12.3.0-1.el9ap	0:12.3.0-1.el9ap
`python3.12-pyasn1` Red Hat:ansible_automation_platform:2.6::el9	before 0:0.6.4-1.el9ap	0:0.6.4-1.el9ap

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-12383 is a high vulnerability (CVSS 7.5) in Red Hat Ansible Automation Platform 2.5 For Rhel 8, published July 27, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.28%, the 20th percentile. Fixed in automation-eda-controller 0:1.1.21-1.el8ap.

References

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