CWE-1056
Weakness ProhibitedInvokable Control Element with Variadic Parameters
Abstraction: Base · Status: Incomplete
A named-callable or method control element has a signature that supports a variable (variadic) number of parameters or arguments.
Mapping guidance
This entry is primarily a quality issue with no direct security implications.
Look for weaknesses that are focused specifically on insecure behaviors that have more direct security implications.
Modes of introduction
Detection methods
Automated Static Analysis
Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Effectiveness: High
Content history
Entry derived from Common Quality Enumeration (CQE) Draft 0.9.
updated Relationships
updated Description
updated Relationships
updated Mapping_Notes
updated Mapping_Notes
updated Applicable_Platforms, Common_Consequences, Description, Detection_Factors, Time_of_Introduction
1 vulnerability references this CWE, most recent first.
GHSA-HHX9-P69V-CX2J
Vulnerability from github – Published: 2021-04-30 17:34 – Updated: 2025-10-22 17:56The previous default setting for Airflow's Experimental API was to allow all API requests without authentication, but this poses security risks to users who miss this fact. From Airflow 1.10.11 the default has been changed to deny all requests by default and is documented at https://airflow.apache.org/docs/1.10.11/security.html#api-authentication. Note this change fixes it for new installs but existing users need to change their config to default [api]auth_backend = airflow.api.auth.backend.deny_all as mentioned in the Updating Guide: https://github.com/apache/airflow/blob/1.10.11/UPDATING.md#experimental-api-will-deny-all-request-by-default
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "apache-airflow"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.10.11"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-13927"
],
"database_specific": {
"cwe_ids": [
"CWE-1056",
"CWE-1188",
"CWE-287",
"CWE-306"
],
"github_reviewed": true,
"github_reviewed_at": "2021-04-20T19:30:46Z",
"nvd_published_at": "2020-11-10T16:15:00Z",
"severity": "CRITICAL"
},
"details": "The previous default setting for Airflow\u0027s Experimental API was to allow all API requests without authentication, but this poses security risks to users who miss this fact. From Airflow 1.10.11 the default has been changed to deny all requests by default and is documented at https://airflow.apache.org/docs/1.10.11/security.html#api-authentication. Note this change fixes it for new installs but existing users need to change their config to default `[api]auth_backend = airflow.api.auth.backend.deny_all` as mentioned in the Updating Guide: https://github.com/apache/airflow/blob/1.10.11/UPDATING.md#experimental-api-will-deny-all-request-by-default",
"id": "GHSA-hhx9-p69v-cx2j",
"modified": "2025-10-22T17:56:14Z",
"published": "2021-04-30T17:34:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-13927"
},
{
"type": "WEB",
"url": "https://github.com/apache/airflow/pull/9611"
},
{
"type": "WEB",
"url": "https://github.com/apache/airflow/commit/180bca4f993b7b778a8d2c65d3d357652218922b"
},
{
"type": "WEB",
"url": "https://github.com/apache/airflow/commit/9e305d6b810a2a21e2591a80a80ec41acb3afed0"
},
{
"type": "WEB",
"url": "https://airflow.apache.org/docs/apache-airflow/1.10.11/security.html#api-authentication"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-hhx9-p69v-cx2j"
},
{
"type": "PACKAGE",
"url": "https://github.com/apache/airflow"
},
{
"type": "WEB",
"url": "https://github.com/apache/airflow/releases/tag/1.10.11"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2020-18.yaml"
},
{
"type": "WEB",
"url": "https://lists.apache.org/thread.html/r23a81b247aa346ff193670be565b2b8ea4b17ddbc7a35fc099c1aadd%40%3Cdev.airflow.apache.org%3E"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13927"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/162908/Apache-Airflow-1.10.10-Remote-Code-Execution.html"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/174764/Apache-Airflow-1.10.10-Remote-Code-Execution.html"
}
],
"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/E:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A",
"type": "CVSS_V4"
}
],
"summary": "Authentication bypass in Apache Airflow"
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.