Apache Airflow CNCF Kubernetes Provider up to 10.16.x JWT Token file information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Apache Airflow CNCF Kubernetes Provider up to 10.16.x. It has been rated as problematic. Impacted is an unknown function of the component JWT Token Handler. The manipulation leads to file information disclosure. This vulnerability is documented as CVE-2026-27173. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Apache Airflow CNCF Kubernetes Provider up to 10.16.x and classified as critical. This issue affects an unknown function of the component JWT Token Handler. The manipulation with an unknown input leads to a file information disclosure vulnerability. Using CWE to declare the problem leads to CWE-538. The product places sensitive information into files or directories that are accessible to actors who are allowed to have access to the files, but not to the sensitive information. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

JWT tokens that were used by workers in Kubernetes Executors have been exposed to users who had read only access to Kuberentes Pods. This could allow users with just read-only access to perform actions that were only available to running tasks via Task SDK and potentially allow to modify state of Airflow Database for tasks.

The weakness was released by Nikolai Dvoinishnikov, Welltory, Anton Kuznetsov and Welltory. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-27173 since 02/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/23/2026). MITRE ATT&CK project uses the attack technique T1083 for this issue.

Upgrading to version 10.17.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-30977). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

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

ADP CISA Base Score: 8.7
ADP CISA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: File information disclosure
CWE: CWE-538 / CWE-200 / CWE-284
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 CNCF Kubernetes Provider 10.17.0
Patch: github.com

Timelineinfo

02/18/2026 CVE reserved
05/19/2026 +89 days Advisory disclosed
05/19/2026 +0 days VulDB entry created
05/23/2026 +4 days VulDB entry last update

Sourcesinfo

Vendor: apache.org

Advisory: github.com
Researcher: Nikolai Dvoinishnikov, Welltory, Anton Kuznetsov, Welltory
Status: Confirmed

CVE: CVE-2026-27173 (🔒)
GCVE (CVE): GCVE-0-2026-27173
GCVE (VulDB): GCVE-100-364721
EUVD: 🔒

Entryinfo

Created: 05/19/2026 22:48
Updated: 05/23/2026 15:02
Changes: 05/19/2026 22:48 (58), 05/20/2026 00:25 (1), 05/23/2026 15:02 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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