{"id":"CVE-2026-85660","state":"PUBLISHED","title":"cli-mcp-server 0.2.5 Command Allowlist Bypass via Shell Substitution","description":"cli-mcp-server 0.2.5 contains a command allowlist bypass vulnerability in the _validate_command_with_operators function when ALLOW_SHELL_OPERATORS is enabled. Attackers can use shell command substitution syntax like $(...) or backticks to execute non-allowlisted commands that bypass the ALLOWED_COMMANDS validation check.","publishedAt":"2026-09-04T14:32:18.149Z","updatedAt":"2026-09-04T17:50:30.858Z","severity":{"score":9.2,"label":"Critical","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["MladenSU cli-mcp-server"],"affected":[{"vendor":"MladenSU","product":"cli-mcp-server","packageURL":"pkg:pypi/cli-mcp-server","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.2.5","versionType":"semver"}]}],"references":["https://github.com/MladenSU/cli-mcp-server/issues/17","https://github.com/MladenSU/cli-mcp-server","https://github.com/MladenSU/cli-mcp-server/blob/main/src/cli_mcp_server/server.py","https://www.vulncheck.com/advisories/cli-mcp-server-0.2.5-command-allowlist-bypass-via-shell-substitution"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/85xxx/CVE-2026-85660.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-85660","state":"PUBLISHED","datePublished":"2026-09-04T14:32:18.149Z","dateUpdated":"2026-09-04T17:50:30.858Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-04T13:32:27.594Z"},"containers":{"cna":{"title":"cli-mcp-server 0.2.5 Command Allowlist Bypass via Shell Substitution","descriptions":[{"lang":"en","value":"cli-mcp-server 0.2.5 contains a command allowlist bypass vulnerability in the _validate_command_with_operators function when ALLOW_SHELL_OPERATORS is enabled. Attackers can use shell command substitution syntax like $(...) or backticks to execute non-allowlisted commands that bypass the ALLOWED_COMMANDS validation check."}],"affected":[{"vendor":"MladenSU","product":"cli-mcp-server","packageURL":"pkg:pypi/cli-mcp-server","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.2.5","versionType":"semver"}]}],"references":[{"url":"https://github.com/MladenSU/cli-mcp-server/issues/17","tags":["issue-tracking"],"name":"GitHub Issue #17"},{"url":"https://github.com/MladenSU/cli-mcp-server","tags":["product"]},{"url":"https://github.com/MladenSU/cli-mcp-server/blob/main/src/cli_mcp_server/server.py","tags":["technical-description"]},{"url":"https://www.vulncheck.com/advisories/cli-mcp-server-0.2.5-command-allowlist-bypass-via-shell-substitution","name":"VulnCheck Advisory: cli-mcp-server 0.2.5 Command Allowlist Bypass via Shell Substitution","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":9.2,"baseSeverity":"CRITICAL"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","lang":"en","description":"Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-04T14:32:18.149Z"},"datePublic":"2026-06-05T00:00:00.000Z","credits":[{"lang":"en","value":"George Chen","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/MladenSU/cli-mcp-server/issues/17","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-04T17:50:11.066401Z","id":"CVE-2026-85660","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-04T17:50:30.858Z"}}]}}}