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High, CVSS 8.8amended

npm PraisonAI SandboxExecutor allowedCommands bypass via shell chaining

CVE-2026-57136GHSA-vjv9-7m7j-h833

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (praisonai 1.7.2), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • npm praisonai

    Affected
    >= 1.2.3, <= 1.7.1
    Fixed in
    1.7.2

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
8.8 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
  • CVE-2026-57136: 0.55% estimated exploitation activity in the next 30 days; percentile 45.90 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary The published npm package praisonai exports SandboxExecutor, CommandValidator, and sandboxExec as "safe command execution with restrictions." When allowedCommands is configured, CommandValidator checks only the first whitespace-delimited token of the command string. SandboxExecutor then passes the entire original string to spawn("sh", ["-c", command]). With a policy that allows only echo, this direct command is correctly rejected: but this chained command is accepted and executed: The shell executes cat even though cat is not allowlisted. This bypasses the command allowlist and can execute arbitrary shell commands with the PraisonAI process privileges when an application, CLI workflow, or agent pipeline exposes sandbox command execution to lower-trust users, prompts, or model output. The PoV is deterministic and local-only. It creates and reads only a temporary marker file. Technical Details In src/praisonai-ts/src/cli/features/sandbox-executor.ts, CommandValidator.validate()…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-vjv9-7m7j-h833

  2. Revision 1 · created ·

    Published from osv record GHSA-vjv9-7m7j-h833

Agent brief

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# Patch Next advisory brief: CVE-2026-57136

Advisory: npm PraisonAI SandboxExecutor allowedCommands bypass via shell chaining
IDs: CVE-2026-57136, GHSA-vjv9-7m7j-h833
Record: https://patchnext.com/advisories/cve-2026-57136 (revision 2, source checked 26 Oct 2026, 12:57 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: praisonai 1.7.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm praisonai: affected >= 1.2.3, <= 1.7.1; fixed in 1.7.2

## Suggested inspection (read-only)
- `npm ls praisonai --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on praisonai.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-vjv9-7m7j-h833 (OSV record GHSA-vjv9-7m7j-h833 lists affected ranges: npm praisonai >=1.2.3 <1.7.2 (fixed))
- Verified: https://github.com/advisories/GHSA-vjv9-7m7j-h833 (GitHub-reviewed advisory GHSA-vjv9-7m7j-h833 lists affected ranges: npm praisonai >=1.2.3 <=1.7.1)

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