---
id: CVE-2026-75158
title: >-
  Apache Airflow's `/assets/events` API returned asset events for every Dag in
  the deployment, with no filter restricting them to the Dags the caller is
  authorized to read
summary: >-
  Apache Airflow's `/assets/events` API returned asset events for every Dag in
  the deployment, with no filter restricting them to the Dags the caller is
  authorized to read. Any authenticated user holding asset-read access could
  therefore e…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-200
vendor: apache
product: airflow
affected:
  - airflow < 3.3.2
patched:
  - airflow 3.3.2
published: '2026-09-21'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:58:05.620'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75158'
references:
  - url: 'https://github.com/apache/airflow/pull/71741'
    label: security@apache.org
  - url: 'https://lists.apache.org/thread/rx5lg86l0qkjl2s7dtmpqxjq0xplr4fy'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/09/21/3'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
  - osv
  - pip
epss: 0.00636
epssPercentile: 0.50294
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T15:26:44.311869Z'
ingestedAt: '2026-09-21T14:38:56.366Z'
aliases:
  - PYSEC-2026-3988
  - BIT-airflow-2026-75158
ecosystem: pip
---

## Overview

Apache Airflow's `/assets/events` API returned asset events for every Dag in the deployment, with no filter restricting them to the Dags the caller is authorized to read. Any authenticated user holding asset-read access could therefore enumerate asset events — including the source Dag ID, task ID, run ID and event timestamps — for Dags they have no permission to see. Because the filter was also absent from the count query, `total_entries` and pagination disclosed the existence of hidden Dags even without inspecting individual rows. Deployments are affected whenever per-Dag access control is used to separate teams or tenants; no special configuration is required. Upgrade to apache-airflow 3.3.2 or later.

## Affected

- `airflow < 3.3.2`

## Remediation

Upgrade past the affected range:

- `airflow 3.3.2`

## Package advisory (CVE-2026-75158)

Affected packages:

- `apache-airflow < 3.3.2`

Patched in:

- `apache-airflow 3.3.2`

Source: https://osv.dev/vulnerability/PYSEC-2026-3988