CVE-2025-59823 — gardener-extension-provid…
CRITICALFix: gardener/gardener-extension-provider-aws@cb5045fCVE-2025-59823 is a critical-severity (CVSS 9.9) Code Injection vulnerability in github.com/gardener/gardener-extension-provider-aws. A fix is available for github.com/gardener/gardener-extension-provider-aws — see the affected versions and patch details below.
Gardener providers vulnerable to code injection when Terraformer is used for infrastructure provisioning
Exploitation Status
No confirmed exploitation observed yet
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-59823.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2025-59823 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,567 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
github.com/gardener/gardener-extension-provider-aws🐹github.com/gardener/gardener-extension-provider-gcp🐹github.com/gardener/gardener-extension-provider-azure🐹github.com/gardener/gardener-extension-provider-openstackReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/gardener/gardener-extension-provider-aws | all versions | 1.64.0go get github.com/gardener/gardener-extension-provider-aws@v1.64.0 |
| 🐹Go | github.com/gardener/gardener-extension-provider-gcp | all versions | 1.46.0go get github.com/gardener/gardener-extension-provider-gcp@v1.46.0 |
| 🐹Go | github.com/gardener/gardener-extension-provider-azure | all versions | 1.55.0go get github.com/gardener/gardener-extension-provider-azure@v1.55.0 |
| 🐹Go | github.com/gardener/gardener-extension-provider-openstack | all versions | 1.49.0go get github.com/gardener/gardener-extension-provider-openstack@v1.49.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/gardener/gardener-extension-provider-aws, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/gardener/gardener-extension-provider-aws to 1.64.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-59823 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2025-59823 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2025-59823. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2025-59823 in your dependencies?
O3 Security finds CVE-2025-59823 across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.