Budibase: Command Injection in Bash Automation Step

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Budibase is an open-source low-code platform. Prior to version 3.33.4, the 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. This issue has been patched in version 3.33.4.

Source published

3 Apr 2026 15:38:23 UTC

Source modified

3 Apr 2026 16:45:28 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 8.7 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

Budibase is an open-source low-code platform. Prior to version 3.33.4, the 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. This issue has been patched in version 3.33.4.

Source published

Apr 3, 2026, 3:38:23 PM (timezone not stated)

Source modified

Apr 3, 2026, 4:45:28 PM (timezone not stated)

Observed here

11 Nov 2026 06:34:06 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 8.7 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

Budibase is an open-source low-code platform. Prior to version 3.33.4, the 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. This issue has been patched in version 3.33.4.

Source published

3 Apr 2026 16:16:35 UTC

Source modified

6 Oct 2026 22:10:00 UTC

Observed here

25 Oct 2026 06:17:10 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 8.7 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Primary · 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

**Location**: `packages/server/src/automations/steps/bash.ts` #### Description The 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. #### Code Reference ```21:28:packages/server/src/automations/steps/bash.ts const command = processStringSync(inputs.code, context) let stdout, success = true try { stdout = execSync(command, { timeout: environment.QUERY_THREAD_TIMEOUT, }).toString() ``` #### Attack Vector An 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., `$(rm -rf /)`, `; malicious-command`, `| malicious-command`). #### Impact - Remote code execution (RCE) - Complete system compromise - Data exfiltration - Lateral movement within the infrastructure #### Recommendation 1. **Immediate**: Disable bash automation step in production until fixed 2. Implement a whitelist of allowed commands 3. Use parameterized command execution with proper escaping 4. Implement command argument validation 5. Consider using a restricted shell or command sandboxing 6. Add rate limiting and monitoring for command execution #### Example Fix ```typescript import { spawn } from "child_process" // Validate against whitelist const ALLOWED_COMMANDS = ["echo", "date", "pwd"] // Extend as needed function sanitizeCommand(input: string): string { // Remove dangerous characters and command chaining return input.replace(/[;&|`$(){}[\]]/g, "").trim() } function validateCommand(cmd: string): boolean { const parts = cmd.split(/\s+/) return ALLOWED_COMMANDS.includes(parts[0]) } export async function run({ inputs, context }) { if (!inputs.code) { return { stdout: "Budibase bash automation failed: Invalid inputs" } } const processedCommand = processStringSync(inputs.code, context) const sanitized = sanitizeCommand(processedCommand) if (!validateCommand(sanitized)) { return { success: false, stdout: "Command not allowed" } } // Use spawn instead of execSync with proper argument handling return new Promise((resolve) => { const [command, ...args] = sanitized.split(/\s+/) const proc = spawn(command, args, { timeout: environment.QUERY_THREAD_TIMEOUT, }) let stdout = "" proc.stdout.on("data", (data) => { stdout += data }) proc.on("close", (code) => { resolve({ stdout, success: code === 0 }) }) }) } ```

Source published

3 Apr 2026 21:53:32 UTC

Source modified

9 Apr 2026 14:48:45 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS_V4 · 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

Publisher rating · HIGH