Automation-controller: automation-controller: workflowjobnode.ancestor_artifacts lacks prevent_search, exposing no_log set_stats artifacts via orm-traversal count-oracle

Summary

CVE	CVE-2026-84720
State	PUBLISHED
Assigner	redhat
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-09-23 20:17:18 UTC
Updated	2026-11-06 01:17:58 UTC
Description	A flaw was found in the Ansible Automation Platform automation-controller. The WorkflowJobNode.ancestor_artifacts database column, which stores the raw merged set_stats artifacts propagated between workflow nodes, is not wrapped in prevent_search() and is therefore accepted for arbitrary field lookups by the REST filter backend, even though it is omitted from the API serializer. Because the column is persisted before Ansible's no_log masking is applied, a user with only read access to a workflow — or, via a regular-expression lookup that bypasses the JSON cross-relation filter guard through the world-readable credential-types endpoint, any authenticated user with no roles — can use the result count as a boolean/count oracle to recover, character by character, secret values that a playbook author explicitly marked no_log, including across organizations.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.002710000 probability, percentile 0.193730000 (date 2026-11-06)

Problem Types: CWE-639 | CWE-639 Authorization Bypass Through User-Controlled Key

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Secondary	6.5	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`
3.1	CNA	CVSS	6.5	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Red Hat	Red Hat Ansible Automation Platform 2.5 For RHEL 8	unaffected 0:4.6.33-1.el8ap * rpm	Not specified
CNA	Red Hat	Red Hat Ansible Automation Platform 2.5 For RHEL 8	unaffected 0:4.6.33-1.el8ap * rpm	Not specified
CNA	Red Hat	Red Hat Ansible Automation Platform 2.5 For RHEL 9	unaffected 0:4.6.33-1.el9ap * rpm	Not specified
CNA	Red Hat	Red Hat Ansible Automation Platform 2.5 For RHEL 9	unaffected 0:4.6.33-1.el9ap * rpm	Not specified
CNA	Red Hat	Red Hat Ansible Automation Platform 2.6 For RHEL 9	unaffected 0:4.7.17-1.el9ap * rpm	Not specified
CNA	Red Hat	Red Hat Ansible Automation Platform 2.6 For RHEL 9	unaffected 0:4.7.17-1.el9ap * rpm	Not specified
CNA	Red Hat	Red Hat Ansible Automation Platform 2.6	unaffected 1789673739 * rpm	Not specified
CNA	Red Hat	Red Hat Ansible Automation Platform 2.7	unaffected 1789580684 * rpm	Not specified

References

Reference	Source	Link	Tags
access.redhat.com/errata/RHSA-2026:71113	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2026:71179	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2026:71177	[email protected]	access.redhat.com
bugzilla.redhat.com/show_bug.cgi	[email protected]	bugzilla.redhat.com
access.redhat.com/security/cve/CVE-2026-84720	[email protected]	access.redhat.com
access.redhat.com/errata/RHSA-2026:71114	[email protected]	access.redhat.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

Additional Advisory Data

Source	Time	Event
CNA	2026-09-02T01:30:14.518Z	Reported to Red Hat.
CNA	2026-09-23T00:00:00.000Z	Made public.

Workarounds

CNA: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

There are currently no legacy QID mappings associated with this CVE.