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Gardener provider extensions vulnerable to code injection when Terraform is used for infrastructure provisioning

Critical severity GitHub Reviewed Published Sep 25, 2025 in gardener/gardener-extension-provider-aws • Updated Sep 26, 2025

Package

gomod github.com/gardener/gardener-extension-provider-aws (Go)

Affected versions

< 1.64.0

Patched versions

1.64.0
gomod github.com/gardener/gardener-extension-provider-azure (Go)
< 1.55.0
1.55.0
gomod github.com/gardener/gardener-extension-provider-gcp (Go)
< 1.46.0
1.46.0
gomod github.com/gardener/gardener-extension-provider-openstack (Go)
< 1.49.0
1.49.0

Description

Impact

A security vulnerability was discovered in Gardener when Terraformer is used for infrastructure provisioning. This vulnerability could allow a user with administrative privileges for a Gardener project to obtain control over the seed cluster where the shoot cluster is managed.

This CVE affects all Gardener installations where Terraformer is used/can be enabled for infrastructure provisioning with any of the affected components mentioned below.

Affected Components

• gardener-extension-provider-gcp
• gardener-extension-provider-azure
• gardener-extension-provider-openstack
• gardener-extension-provider-aws

Affected Versions

• gardener-extension-provider-gcp < v1.46.0
• gardener-extension-provider-azure < v1.55.0
• gardener-extension-provider-openstack < v1.49.0
• gardener-extension-provider-aws < v1.64.0

Fixed versions

• gardener-extension-provider-gcp >= v1.46.0
• gardener-extension-provider-azure >= v1.55.0
• gardener-extension-provider-openstack >= v1.49.0
• gardener-extension-provider-aws >= v1.64.0

How do I mitigate this vulnerability?

Update to a fixed version.

References

@kon-angelo kon-angelo published to gardener/gardener-extension-provider-aws Sep 25, 2025
Published by the National Vulnerability Database Sep 25, 2025
Published to the GitHub Advisory Database Sep 25, 2025
Reviewed Sep 25, 2025
Last updated Sep 26, 2025

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(23rd percentile)

Weaknesses

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Learn more on MITRE.

Improper Control of Generation of Code ('Code Injection')

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Learn more on MITRE.

CVE ID

CVE-2025-59823

GHSA ID

GHSA-227x-7mh8-3cf6

Source code

Credits

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