Agentic-Flow: OS Command Injection in agentic-flow MCP server tools via unsanitized tool-parameter interpolation into execSync

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

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

EPSS

• CVE-2026-58195: 0.56% estimated exploitation activity in the next 30 days; percentile 46.78 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary agentic-flow versions <= 2.0.13 MCP server tools interpolated attacker-influenceable tool parameters (e.g. agent, task, name, language, agentdb arguments) directly into shell command strings passed to execSync(). A malicious value reaching any of the affected MCP tools could break out of the surrounding double-quoted argument and execute arbitrary OS commands with the privileges of the user running the MCP server. This was a partial-fix gap: prior commit 6a06854 (#158) fixed CWE-78 elsewhere in the project but missed the MCP server files entirely. Impact Any MCP tool argument that the AI agent treats as data but the implementation interpolates into a shell command string becomes a command-injection vector. In MCP deployments where untrusted content (web pages, files, third-party tool output) is processed by the agent, this is reachable without direct attacker access to the host. The HTTP/SSE transports (http-sse.ts, http-streaming-updated.ts) expose the same sinks without…

Published by the source

19 Jun 2026, 15:12 UTC

Last modified by the source

19 Jul 2026, 03:56 UTC

Source last checked

26 Oct 2026, 12:56 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-vcv2-r9jh-99m5

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-vcv2-r9jh-99m5

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# Patch Next advisory brief: CVE-2026-58195

Advisory: Agentic-Flow: OS Command Injection in agentic-flow MCP server tools via unsanitized tool-parameter interpolation into execSync
IDs: CVE-2026-58195, GHSA-vcv2-r9jh-99m5
Record: https://patchnext.com/advisories/cve-2026-58195 (revision 2, source checked 26 Oct 2026, 12:56 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: agentic-flow 2.0.14. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm agentic-flow: affected <= 2.0.13; fixed in 2.0.14

## Suggested inspection (read-only)
- `npm ls agentic-flow --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 agentic-flow.
- 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-vcv2-r9jh-99m5 (OSV record GHSA-vcv2-r9jh-99m5 lists affected ranges: npm agentic-flow >=0 <2.0.14 (fixed))
- Verified: https://github.com/advisories/GHSA-vcv2-r9jh-99m5 (GitHub-reviewed advisory GHSA-vcv2-r9jh-99m5 lists affected ranges: npm agentic-flow >=0 <=2.0.13)

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