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CVE-2026-91988

atomic-agents-stack before 1.1.0 Remote Code Execution via HTTP MCP

CVSS 4.0 9.2 CRITICALCVSS 3.1 8.1 HIGHCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-91988

Published

atomic-agents-stack before 1.1.0 accepts cleartext HTTP schemes in the HTTP MCP server-registry backend factory, allowing network man-in-the-middle attackers to rewrite catalog responses. Attackers can inject arbitrary command and argument values that are spawned as local subprocesses by MCPClientPool to achieve code execution on the agent host.

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Affected versions, risk and source history

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Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-91988 · CVE overview and exploitation status

cve-program · CVE-2026-91988

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