Resource exhaustion in Dep0we Atomic-Agents-Stack
CVE-2026-91987
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/dep0we/atomic-agents-stack/security/advisories/GHSA-j659-8xh6-5pq5 (vendor-advisory)
- www.vulncheck.com/advisories/atomic-agents-stack-before-1.1.0-cost-guardrail-by… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91987?
- CVE-2026-91987 is a medium-severity vulnerability in Dep0we Atomic-Agents-Stack, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-09-15.
- How severe is CVE-2026-91987?
- Medium severity. CVSS v3 base score is 6.5 out of 10.