CVE-2026-84717: Automation-controller: automation-controller: unauthenticated 200-vs-403 oracle in bitbucket data center webhook receiver enumerates webhook-enabled job templates

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-23 · updated 2026-09-26
Weakness: CWE-204

Description

A flaw was found in the Ansible Automation Platform automation-controller. The unauthenticated Bitbucket Data Center webhook receiver skips HMAC signature verification for diagnostics:ping events after it has already looked up the target template, causing the endpoint to return HTTP 200 for a template that has a Bitbucket DC webhook configured and HTTP 403 otherwise. An unauthenticated remote attacker can use this response discrepancy as an oracle to enumerate which Job Template and Workflow Job Template IDs have Bitbucket DC webhooks configured, without knowing the secret webhook_key.

Affected products

Red Hat Ansible Automation Platform 2.5 for RHEL 8: all versions — fixed in 0:4.6.33-1.el8ap
Red Hat Ansible Automation Platform 2.5 for RHEL 9: all versions — fixed in 0:4.6.33-1.el9ap
Red Hat Ansible Automation Platform 2.6: all versions — fixed in 1789673739
Red Hat Ansible Automation Platform 2.6 for RHEL 9: all versions — fixed in 0:4.7.17-1.el9ap
Red Hat Ansible Automation Platform 2.7: all versions — fixed in 1789580684

How to fix

Upgrade to a fixed version: Red Hat Ansible Automation Platform 2.5 for RHEL 8 0:4.6.33-1.el8ap; Red Hat Ansible Automation Platform 2.5 for RHEL 9 0:4.6.33-1.el9ap; Red Hat Ansible Automation Platform 2.6 1789673739; Red Hat Ansible Automation Platform 2.6 for RHEL 9 0:4.7.17-1.el9ap; Red Hat Ansible Automation Platform 2.7 1789580684. Check the vendor advisory for mitigations.

References

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