CVE-2020-13927

CRITICAL
9.8
CVSS Score
Published: November 10, 2020 at 12:00 AM UTC
Updated: June 17, 2026 at 02:53 AM UTC
1 product affected across 1 vendorAirflow

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 100%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score99.8%

EPSS (Exploit Prediction Scoring System) estimates a 99.8% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

The previous default setting for Airflow's Experimental API was to allow all API requests without authentication.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Jan 18, 2022
Remediation Due
Jul 18, 2022
1567 days overdue

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.10.11
Affected range stops below 1.10.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-306CWE-1188

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