GHSA-63HM-G96R-2M2Q

Vulnerability from github – Published: 2026-11-13 18:54 – Updated: 2026-11-13 18:54
VLAI
Summary
Laravel: Task Output Injection - Concurrency Process
Details

Summary

If a concurrency task prints user-controlled text, an attacker can forge the framework's internal result message and achieve remote code execution in certain conditions

Pre-reqs

Insecure code and insecure handling of user provided input (devs trust user-provided input) :

  1. App has a route that reaches Concurrency::run() (Not by default, it requires app code)

  2. The task writes user-controlled data to stdout (echo/print/dd of input, hand-built JSON via string concat, passthrough of tool output), and the user-controlled bytes can be made to start the child's stdout and form a complete JSON document followed by \x1f\x8b (Not by default, requires the specific coding pattern in the app code)

Patches

  • 13.40.0
  • 12.71.0
Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "laravel/framework"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "12.71.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "laravel/framework"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "13.0.0"
            },
            {
              "fixed": "13.40.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-128083"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-13T18:54:31Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Summary\n\nIf a concurrency task prints user-controlled text, an attacker can forge the framework\u0027s internal result message and achieve remote code execution in certain conditions\n\n### Pre-reqs\n\nInsecure code and insecure handling of user provided input (devs trust user-provided input) :\n\n1. App has a route that reaches Concurrency::run() (Not by default, it requires app code)\n\n2. The task writes user-controlled data to stdout (echo/print/`dd` of input, hand-built JSON via string concat, passthrough of tool output), and the user-controlled bytes can be made to start the child\u0027s stdout and form a complete JSON document followed by \\x1f\\x8b  (Not by default, requires the specific coding pattern in the app code)\n\n### Patches\n* 13.40.0\n* 12.71.0",
  "id": "GHSA-63hm-g96r-2m2q",
  "modified": "2026-11-13T18:54:31Z",
  "published": "2026-11-13T18:54:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/laravel/framework/security/advisories/GHSA-63hm-g96r-2m2q"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laravel/framework/pull/62297"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laravel/framework/commit/0f904940d176d51db1105cc925136f01bb69e92c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laravel/framework/commit/c37133b89b30a86eb404537151edd8944e938f0a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/laravel/framework"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laravel/framework/releases/tag/v12.71.0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/laravel/framework/releases/tag/v13.40.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Laravel: Task Output Injection - Concurrency Process"
}



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