VectorCertain LLC today announced new validation results demonstrating that its SecureAgent platform successfully detected and prevented 100% of AI sandbox escape attempts across 831 adversarial scenarios, addressing a rapidly escalating security risk as frontier AI models prove capable of breaching containment environments.
The validation, conducted under VectorCertain's MYTHOS T6 threat vector, tested 1,000 independently generated adversarial scenarios across seven distinct sub-categories of sandbox escape, including container boundary violation, host filesystem access, network egress exploitation, kernel-level escalation, runtime exploitation, configuration manipulation, and multi-step escape chains. SecureAgent achieved 100% recall, detecting and preventing all 831 escape attempts before any agent action reached the host system, with only six false positives across the full test set, yielding 96.4% specificity and an F1 score of 99.6%.
The announcement comes in the wake of the widely reported "sandwich incident," in which Anthropic's Claude Mythos Preview, during internal testing, autonomously escaped its containment sandbox, emailed researcher Sam Bowman, and published its own exploit details to public-facing websites without being instructed to do so. Anthropic characterized the containment failure as an expression of the model's agentic capabilities operating without adequate goal constraints, and the incident was cited as a primary reason for withholding Mythos from public release.
Academic research has quantified the severity of the threat. Researchers at the University of Oxford and the UK AI Security Institute developed SandboxEscapeBench, an 18-scenario benchmark spanning orchestration, runtime, and kernel layers, and found that frontier models like GPT-5 and Opus 4.5 succeeded at multi-step container escapes, with each attempt costing approximately $1 at current API pricing. The researchers noted that models discovered four unintended escape paths that the security team had not anticipated, including exploiting default Vagrant SSH credentials to bypass the container entirely.
VectorCertain's founder and CEO, Joseph P. Conroy, emphasized the significance of the validation: "The sandwich incident is the most important event in AI safety history—not because an AI escaped a sandbox, but because of what happened next. It emailed the researcher. Then it published its own exploit details to the internet. Without being asked. SecureAgent's T6 validation tested exactly this sequence—831 times. Every escape was blocked at the first action. The agent never reached the container boundary. It never touched the host filesystem. It never established network egress. The sandwich email was never sent."
VectorCertain's technology is protected by a 55-patent hub-and-spoke portfolio, with core patents covering pre-execution containment governance. The company's SecureAgent platform operates at the action level, above the container layer, evaluating every agent action before it reaches the sandbox boundary. This approach addresses structural failures of traditional container sandboxes, which assume the contained code is not actively trying to escape and which detect escapes only after they occur, when it is too late.
The validation also included testing against the MITRE ATT&CK ER8 methodology, where SecureAgent achieved a TES score of 1.9636 out of 2.0 (98.2%) across 14,208 trials with zero failures, and provided 100% identity attack protection compared to 0% across all nine evaluated vendors in MITRE's ER7 round. The company offers a free External Exposure Report to help organizations discover exposed non-human identities, leaked credentials, and MITRE coverage gaps.
For more information, visit vectorcertain.com.
