CVE-2026-91987
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Sep 15, 2026
Vendor
unknown
Description
atomic-agents-stack before 1.1.0 contains a cost-guardrail bypass in the _estimate_batch_cost function that returns zero cost for unknown models not in the pricing table. Attackers can configure deployments with unknown model identifiers to bypass daily cost caps and exceed budget limits in parallel batch operations.