6.5

CVE-2021-26559: apache software foundation apache airflow Improper Access Control

CVSS: 6.5v3.1MediumModified
AliasesGHSA-ffw3-6mp6-jmvjBIT-airflow-2021-26559PYSEC-2021-2
Published 17-02-2021Last modified 13-02-2025
Open JSON

Vulnerability summary

CVE-2021-26559 is a medium (CVSS 6.5) Improper Access Control vulnerability in apache software foundation apache airflow. EPSS estimates a 2.80% chance of exploitation in the next 30 days, higher than 86.2% of scored vulnerabilities.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
2.80%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 17-02-2021
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

Improper Access Control on Configurations Endpoint for the Stable API of Apache Airflow allows users with Viewer or User role to get Airflow Configurations including sensitive information even when `[webserver] expose_config` is set to `False` in `airflow.cfg`. This allowed a privilege escalation attack. This issue affects Apache Airflow 2.0.0.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

2.80%

Chance of exploitation in the next 30 days

Percentile

86%

Versus all other CVEs

30-day change

0.00 pp

From 2.80% on 18-09-2026

18-09-202618-10-2026
EPSS score
2.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
Apache software foundation1 product
PyPI1 product
  • apache-airflow≥ 2.0.0, < 2.0.1rc1 | < 2.0.1

3 vendors · 3 products

References

11 links
Show all 11 references