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OpenAdvisories
Medium · 6.5 CVE-2026-91987 EUVD-2026-78658GHSA-gpqc-jrqh-x9xpGHSA-j659-8xh6-5pq5

atomic-agents-stack before 1.1.0 Cost Guardrail Bypass via Unknown Model

Published Sep 15, 2026 · Updated Sep 17, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
dep0we atomic-agents-stack < 1.1.0 1.1.0

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI atomic-agents-stack < 1.1.0 1.1.0 GHSA-j659-8xh6-5pq5

References