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Vendor Workaround
The schedule preview endpoint is available to any authenticated user and cannot be restricted by RBAC, so exposure can only be reduced by limiting API access to trusted users.
Tracking
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Mon, 09 Nov 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in the rrule validation of schedules in automation controller. Several non-anchored regular expressions with lazy wildcard prefixes are applied to the user-supplied rrule value; when the expected DTSTART/RRULE tokens are absent, validation time grows quadratically with the length of the value. An authenticated user can submit a large token-free rrule through the REST API, including the schedule preview endpoint, which requires no resource-level permissions; validation runs synchronously in the API web worker, so a single such request occupies a worker for an extended time and repeated requests can exhaust the web worker pool, denying access to the API and web UI while the attack is sustained. The impact is limited to availability. | |
| Title | Automation-controller: automation-controller: quadratic regex in schedule rrule validation allows an authenticated user to exhaust api web workers (denial of service) | |
| First Time appeared |
Redhat
Redhat ansible Automation Platform |
|
| Weaknesses | CWE-1333 | |
| CPEs | cpe:/a:redhat:ansible_automation_platform:2 | |
| Vendors & Products |
Redhat
Redhat ansible Automation Platform |
|
| References |
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| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-11-09T18:16:53.855Z
Reserved: 2026-11-09T16:37:12.862Z
Link: CVE-2026-125063
No data.
Status : Awaiting Analysis
Published: 2026-11-09T18:17:27.053
Modified: 2026-11-09T18:17:27.177
Link: CVE-2026-125063
No data.
OpenCVE Enrichment
No data.
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CWE-1333
Inefficient Regular Expression Complexity