{"id":"GHSA-gjw9-34gf-rp6m","summary":"Budibase: Command Injection in Bash Automation Step","details":"**Location**: `packages/server/src/automations/steps/bash.ts`  \n\n#### Description\nThe bash automation step executes user-provided commands using `execSync` without proper sanitization or validation. User input is processed through `processStringSync` which allows template interpolation, potentially allowing arbitrary command execution.\n\n#### Code Reference\n```21:28:packages/server/src/automations/steps/bash.ts\n    const command = processStringSync(inputs.code, context)\n\n    let stdout,\n      success = true\n    try {\n      stdout = execSync(command, {\n        timeout: environment.QUERY_THREAD_TIMEOUT,\n      }).toString()\n```\n\n#### Attack Vector\nAn attacker with access to create or modify automations can inject malicious shell commands by including template syntax that evaluates to command injection payloads (e.g., `$(rm -rf /)`, `; malicious-command`, `| malicious-command`).\n\n#### Impact\n- Remote code execution (RCE)\n- Complete system compromise\n- Data exfiltration\n- Lateral movement within the infrastructure\n\n#### Recommendation\n1. **Immediate**: Disable bash automation step in production until fixed\n2. Implement a whitelist of allowed commands\n3. Use parameterized command execution with proper escaping\n4. Implement command argument validation\n5. Consider using a restricted shell or command sandboxing\n6. Add rate limiting and monitoring for command execution\n\n#### Example Fix\n```typescript\nimport { spawn } from \"child_process\"\n\n// Validate against whitelist\nconst ALLOWED_COMMANDS = [\"echo\", \"date\", \"pwd\"] // Extend as needed\n\nfunction sanitizeCommand(input: string): string {\n  // Remove dangerous characters and command chaining\n  return input.replace(/[;&|`$(){}[\\]]/g, \"\").trim()\n}\n\nfunction validateCommand(cmd: string): boolean {\n  const parts = cmd.split(/\\s+/)\n  return ALLOWED_COMMANDS.includes(parts[0])\n}\n\nexport async function run({ inputs, context }) {\n  if (!inputs.code) {\n    return { stdout: \"Budibase bash automation failed: Invalid inputs\" }\n  }\n\n  const processedCommand = processStringSync(inputs.code, context)\n  const sanitized = sanitizeCommand(processedCommand)\n  \n  if (!validateCommand(sanitized)) {\n    return {\n      success: false,\n      stdout: \"Command not allowed\"\n    }\n  }\n\n  // Use spawn instead of execSync with proper argument handling\n  return new Promise((resolve) =\u003e {\n    const [command, ...args] = sanitized.split(/\\s+/)\n    const proc = spawn(command, args, {\n      timeout: environment.QUERY_THREAD_TIMEOUT,\n    })\n    \n    let stdout = \"\"\n    proc.stdout.on(\"data\", (data) =\u003e { stdout += data })\n    proc.on(\"close\", (code) =\u003e {\n      resolve({ stdout, success: code === 0 })\n    })\n  })\n}\n```","aliases":["CVE-2026-25044"],"modified":"2026-04-09T14:48:45.067013Z","published":"2026-04-03T21:53:32Z","database_specific":{"cwe_ids":["CWE-78"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-04-03T21:53:32Z","nvd_published_at":"2026-04-03T16:16:35Z"},"references":[{"type":"WEB","url":"https://github.com/Budibase/budibase/security/advisories/GHSA-gjw9-34gf-rp6m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25044"},{"type":"PACKAGE","url":"https://github.com/Budibase/budibase"},{"type":"WEB","url":"https://github.com/Budibase/budibase/releases/tag/3.33.2"}],"affected":[{"package":{"name":"@budibase/server","ecosystem":"npm","purl":"pkg:npm/%40budibase/server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.33.4"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-gjw9-34gf-rp6m/GHSA-gjw9-34gf-rp6m.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}