---
cve: "CVE-2020-13927"
severity: "CRITICAL"
cvss: 9.8
epss: "99.8%"
vendor: "n/a"
kev: true
exploited: true
published: "2020-11-10 16:15:11"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T18:41:39+01:00"
---

# CVE-2020-13927

> 9.8 CRITICAL · ⚠️ CISA KEV (1756 Tage) · 🔓 Exploited · 🧪 PoC

## Beschreibung

The 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

## CNA-Record (Kanon, cvelistV5)

- CNA: **apache**
- State: PUBLISHED
- Stand: 2025-10-21 23:35:32

## CISA-Anreicherung (vulnrichment/ADP)

- CISA KEV seit: **18.01.2022**
- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **active**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-1056** — Invokable Control Element with Variadic Parameters
  A named-callable or method control element has a signature that supports a variable (variadic) number of parameters or arguments.
- **CWE-1188** — Initialization of a Resource with an Insecure Default
  The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.
- **CWE-306** — Missing Authentication for Critical Functionality
  The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

## Exploit-Evidenz

- [EDB-49927 — Apache Airflow 1.10.10 - 'Example Dag' Remote Code Execution](https://www.exploit-db.com/exploits/49927)

## Patch verfügbar (OSV)

- f53b1d0041d3dc087ff2c6addaa72266e784b928 (Commit)

## Referenzen

- <https://lists.apache.org/thread.html/r23a81b247aa346ff193670be565b2b8ea4b17ddbc7a35fc099c1aadd%40%3Cdev.airflow.apache.org%3E>
- <http://packetstormsecurity.com/files/162908/Apache-Airflow-1.10.10-Remote-Code-Execution.html>
- <http://packetstormsecurity.com/files/174764/Apache-Airflow-1.10.10-Remote-Code-Execution.html>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13927>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2020-13927/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_