---
id: CVE-2026-45426
aliases:
  - GHSA-x5wm-j6wh-2834
  - BIT-airflow-2026-45426
  - PYSEC-2026-174
title: Apache Airflow has an Incorrect Authorization issue
summary: Apache Airflow has an Incorrect Authorization issue
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'
vendor: apache-airflow
product: apache-airflow
ecosystem: pip
affected:
  - 'apache-airflow >= 3.0.0, < 3.2.2'
patched:
  - apache-airflow 3.2.2
published: '2026-06-01'
updated: '2026-07-09'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-x5wm-j6wh-2834'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-45426'
  - url: 'https://github.com/apache/airflow/pull/66749'
  - url: 'https://github.com/apache/airflow'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-174.yaml
  - url: 'https://lists.apache.org/thread/hz1q7vg65vq2h4fobv5ww8tp257fbqj9'
  - url: 'http://www.openwall.com/lists/oss-security/2026/05/31/13'
tags:
  - osv
  - pip
epss: 0.00518
epssPercentile: 0.41584
ingestedAt: '2026-07-10T13:49:11.208Z'
---

## Overview

Exploitation requires the attacker to already be an authenticated Airflow worker holding a valid Log-server JWT issued for at least one Dag. Apache Airflow's Log server authorized JWT tokens against Dag IDs by applying Python's `str.lstrip()` to the requested path segment when verifying the JWT's `sub` claim. `str.lstrip()` strips any of a *set* of characters from the left (not a prefix), so a JWT issued for a Dag named e.g. `dag_a` would authorize log access to any other Dag whose name began with any subset of the characters `{d, a, g, _}` (e.g. `dag_attacker`, `aaaa_target`, `_dag_secret`). Such an authenticated worker could enumerate and read worker logs of other Dags whose names happened to share that character-class prefix, leaking task output and error traces beyond the documented per-Dag isolation boundary. Affects deployments relying on per-Dag log-access scoping (multi-team, shared-executor, shared-worker topologies). Users are advised to upgrade to `apache-airflow` 3.2.2 or later.

## Affected packages

- `apache-airflow >= 3.0.0, < 3.2.2`

## Remediation

Upgrade to a patched release:

- `apache-airflow 3.2.2`