SEPTEMBER 17, 2026
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Case File

CVE-2026-91987

MEDIUM · CVSS 6.5 EPSS 0.37% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-15 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The vulnerability in atomic-agents-stack prior to version 1.1.0 allows attackers to exploit the _estimate_batch_cost function, enabling them to bypass cost limitations by using unknown model identifiers not listed in the pricing table. This could lead to uncontrolled expenses during parallel batch operations, potentially exceeding budget caps. Organizations utilizing this software, particularly those with strict budgetary constraints, should prioritize addressing this issue to mitigate financial risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-91987
Severity
MEDIUM
CVSS
6.5
EPSS
0.37%

Original NVD 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.