---
id: CVE-2026-67260
title: >-
  Apache Airflow 3.3.0 moved human-in-the-loop tasks from the triggerer to a new
  `awaiting_input` task state swept by the scheduler
summary: >-
  Apache Airflow 3.3.0 moved human-in-the-loop tasks from the triggerer to a new
  `awaiting_input` task state swept by the scheduler. That sweep deserializes
  the task instance's `next_kwargs` without an allow-list, so a Dag author — who
  con…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-502
vendor: apache
product: airflow
affected:
  - 'airflow >= 3.3.0, < 3.3.1'
patched:
  - airflow 3.3.1
published: '2026-08-12'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:17:40.903'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67260'
references:
  - url: 'https://github.com/apache/airflow/pull/70685'
    label: security@apache.org
  - url: 'https://lists.apache.org/thread/vygr0fh82cjzjp5k4vtfmboxryvm3lyn'
    label: security@apache.org
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-58076'
    label: security@apache.org
tags:
  - nvd
  - cve.org
  - osv
  - pip
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-12T16:00:14.166719Z'
epss: 0.01397
epssPercentile: 0.71276
aliases:
  - PYSEC-2026-3707
  - BIT-airflow-2026-67260
ecosystem: pip
ingestedAt: '2026-08-19T19:22:21.342Z'
---

## Overview

Apache Airflow 3.3.0 moved human-in-the-loop tasks from the triggerer to a new `awaiting_input` task state swept by the scheduler. That sweep deserializes the task instance's `next_kwargs` without an allow-list, so a Dag author — who controls that value through the task execution API — can cause an arbitrary module import and object instantiation inside the scheduler process, or terminate the scheduler job. No non-default configuration is required: the sweep runs unconditionally every 15 seconds, and the default `allowed_deserialization_classes` setting does not cover this code path. Versions before 3.3.0 are not affected, because human-in-the-loop tasks deferred onto the triggerer instead. This is a different code path from CVE-2026-58076, which covers the same unguarded exception-node deserialization reached elsewhere — deployments that applied that fix must upgrade for this issue as well. Users are advised to upgrade to apache-airflow 3.3.1 or later.

## Affected

- `airflow >= 3.3.0, < 3.3.1`

## Remediation

Upgrade past the affected range:

- `airflow 3.3.1`

## Package advisory (CVE-2026-67260)

Affected packages:

- `apache-airflow >= 3.3.0, < 3.3.1`

Patched in:

- `apache-airflow 3.3.1`

Source: https://osv.dev/vulnerability/PYSEC-2026-3707