CVE-2026-19594

Snowflake.core privesc via path traversal and parameter pollution.

• CVSS 8.1
• 22
• Input Validation and Sanitization
• Remote

Insufficient input sanitization in Snowflake Python API (`snowflake.core`) versions prior to 1.13.0 allowed confused-deputy privilege escalation through two related weaknesses: path traversal (CWE-22) via unencoded `..` identifier path segments, and HTTP parameter pollution (CWE-141) via unencoded `&`/`#`/`=` characters in query string values. An attacker with access to a downstream application built on snowflake.core could exploit the path traversal by supplying `..` as an object name, causing `snowflake.core` to issue REST requests against a parent resource or exploit the parameter pollution by injecting `&`/`#`/`=` into a free-form name field to override constraints on swap, clone, or rename operations — all executed under the application's privileged session. Successful exploitation requires the attacker to control an identifier or object-name string in an application built on snowflake.core that passes it to `snowflake.core` under a higher-privileged Snowflake session (e.g., an EXECUTE AS OWNER stored procedure, Streamlit app, or Native App). The fix is available in Snowflake Python API version 1.13.0, which also addresses several additional security findings. Users must manually upgrade.

CVE

CVE-2026-19594

CWE

22

CVSS base score

8.1

Published

2026-08-12

OWASP

A01 Broken Access Control

Orthogonal defect classification

Checking

Code defect classification

Missing Check

Category

Input Validation and Sanitization

Subcategory

Path Traversal

Accessibility scope

Remote

Impact

Privilege Escalation

Affected component

Snowflake Py

Fixed by upgrading

Yes

Solution

Upgrade the Snowflake Python API to version 1.13.0 or later.

import requests
from typing import Any, Dict


class _RestClient:
    def __init__(self, session: requests.Session, options: Dict[str, Any]):
        self._session = session
        self._base_url = options.get("url", "")

    def drop_schema_object(
        self,
        schema_name: str,
        object_type_plural: str,
        object_name: str,
    ) -> None:
        # VULNERABLE: unsanitized object_name lets ".." traverse to the parent REST resource
        endpoint = f"/schemas/{schema_name}/{object_type_plural}/{object_name}"
        self._session.delete(self._base_url + endpoint)

import requests
from typing import Any, Dict
from urllib.parse import quote


class _RestClient:
    def __init__(self, session: requests.Session, options: Dict[str, Any]):
        self._session = session
        self._base_url = options.get("url", "")

    def drop_schema_object(
        self,
        schema_name: str,
        object_type_plural: str,
        object_name: str,
    ) -> None:
        # FIX: reject traversal segments and percent-encode the identifier before use in the path
        if object_name in (".", "..") or "/" in object_name or "\\" in object_name:
            raise ValueError("invalid object name")
        safe_object_name = quote(object_name, safe="")
        endpoint = f"/schemas/{schema_name}/{object_type_plural}/{safe_object_name}"
        self._session.delete(self._base_url + endpoint)

new_object_name&overwrite=true

@misc{vaitp:cve202619594,
  title        = {{Snowflake.core privesc via path traversal and parameter pollution.}},
  author       = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
  year         = {2026},
  note         = {VAITP Python Vulnerability Dataset, entry CVE-2026-19594},
  howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2026-19594/}}
}