CVE-2026-40913: Apache Airflow · Improper Authorization
Affects Apache AirflowSource CVE Database V5
Not known to be exploited : upgrade to 3.4.0 when convenient.
Data as of 9 Nov 2026, 10:47 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- Patch
- Available – fixed in 3.4.0
Exploitation evidence
Disclosed: evidence found.
CVE published 9 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.
What to do
Upgrade Apache Airflow and apache-airflow-core to 3.4.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apache Airflowapache-airflow-core | Affected
| Fixed in
|
PyPIapache-airflow-corepkg:pypi/apache-airflow-coreOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade Apache Airflow to version 3.4.0 or later, where the vulnerability is fixed by restricting stack trace access to users with the new IMPORT_ERRORS_ALL permission. No other mitigation is required as the fix is official and available.
Description
Apache Airflow versions prior to 3.4.0 have an improper authorization vulnerability in the Import Errors API. The API returns raw parse-failure stack traces to any user with the ImportError.can_read permission when the failing file has no registered DAG. This can expose sensitive file paths and code to unauthorized users. The issue is fixed in Apache Airflow 3.4.0, which restricts stack trace access to users with the new IMPORT_ERRORS_ALL permission.