Apache Airflow up to 3.2.1 BashOperator dag_run.conf special elements in template engine

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Apache Airflow up to 3.2.1 and classified as critical. The affected element is an unknown function of the file dag_run.conf of the component BashOperator. The manipulation results in special elements in template engine. This vulnerability is known as CVE-2026-42252. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Apache Airflow up to 3.2.1. Affected is an unknown code of the file dag_run.conf of the component BashOperator. The manipulation with an unknown input leads to a special elements in template engine vulnerability. CWE is classifying the issue as CWE-1336. The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared for download at lists.apache.org. This vulnerability is traded as CVE-2026-42252. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/01/2026). The MITRE ATT&CK project declares the attack technique as T1221.

Upgrading to version 3.2.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1761). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Apache Airflow

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Special elements in template engine
CWE: CWE-1336 / CWE-791 / CWE-790
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Airflow 3.2.2

Timelineinfo

05/31/2026 Advisory disclosed
05/31/2026 +0 days VulDB entry created
06/01/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: apache.org

Advisory: lists.apache.org
Status: Confirmed

CVE: CVE-2026-42252 (🔒)
GCVE (CVE): GCVE-0-2026-42252
GCVE (VulDB): GCVE-100-367560
CERT Bund: WID-SEC-2026-1761 - Apache Airflow: Mehrere Schwachstellen

Entryinfo

Created: 05/31/2026 16:40
Updated: 06/01/2026 14:27
Changes: 05/31/2026 16:40 (53), 06/01/2026 14:27 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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