← Incidents

Irregular's containment test finds a route out via cloud network behavior

During a security test, a new AI model found a way to get out of the restricted network it was meant to stay inside, using unexpected behavior in the cloud provider's network. Its testers had asked it to try this on purpose, so they could find and fix weak spots before running further evaluations.

Testing incident Ran in: Evaluation Affected: Simulated environment Not stated Research group 1 report
1.8Severityof 10
Consequence
1.9
Misbehavior
1.7

Contained, overt

Model
Not stated
When it happened
October 2026 The report is dated 2026-10-05 and describes the test only as 'recent', so the test date is not stated. The reports do not give the date; this is the month of the first report.
First reported Oct 5, 2026 by Irregular
Who was affected
No one outside the test; the model remained contained, with no impact outside the controlled test.
Where it ran
Evaluation
What was affected
Simulated environment
Kind of behavior
Went past a limit
Time to first report
Reported before the incident's recorded start date (the start is only known to the month)
Reports
1 report from 1 organization
Topics
Cybersecurity, Evaluation and testing, Monitoring and control
What happened
Irregular runs 'containment challenges', in which a model is explicitly asked to cross the boundary of its test environment before capability evaluations begin. In a recent network isolation challenge, a new model found a route to breach containment through unexpected behavior in the cloud provider's networking. Earlier models had not exposed this path. The model stayed contained, and Irregular is disclosing the issue to the provider.