{"id":"CVE-2026-91988","summary":"atomic-agents-stack before 1.1.0 Remote Code Execution via HTTP MCP","details":"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.","aliases":["GHSA-xhcr-cqfr-m3hv"],"modified":"2026-09-17T03:47:21.521968042Z","published":"2026-09-15T15:18:30.347Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-319"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91988.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91988.json"},{"type":"ADVISORY","url":"https://github.com/dep0we/atomic-agents-stack/security/advisories/GHSA-xhcr-cqfr-m3hv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91988"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/atomic-agents-stack-before-1.1.0-remote-code-execution-via-http-mcp"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dep0we/atomic-agents-stack","events":[{"introduced":"0"},{"fixed":"459ae99c9adf9ce608c991730112f95b8f03bff6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.1.0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v1.0.0","v0.13.0","v0.12.0","v0.11.0","v0.10.0","v0.9.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91988.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}