CVE-2019-12243: Vulnerability in Istio Package - Incorrect Access Control
Summary
CVE-2019-12243: Istio may not check inbound TCP connections against istio-policy. Affects istio.io/istio versions >= 1.1.0, < 1.1.7. Fixed in 1.1.7. How to fix ↓
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Background
The Istio package is a popular open-source service mesh platform that provides traffic management, security, and observability for microservices. It is written in Go and is widely used in cloud-native environments. The 'istio.io/istio/pkg/log' package within Istio is responsible for logging functionality.
Vulnerability Detail
The vulnerability, identified as CVE-2019-12243, is an Incorrect Access Control issue in Istio versions 1.1.x through 1.1.6. This vulnerability allows unauthorized access to certain resources, potentially leading to privilege escalation or unauthorized data exposure. The vulnerability has a CVSS score of 8.9, indicating a high severity level. It is classified under CWE-284.
How To Fix
Latest published version: v0.0.0-20261021223355-ac152d313bbc as of 22 Oct 2026
go get istio.io/istio@v0.0.0-20261021223355-ac152d313bbcUpgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
1.1.7
This is the first release that contains the fix.
go get istio.io/istio@v1.1.7Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the recommended fix by upgrading Istio to a secure version.
Conclusion
The vulnerability in the Istio package, identified as CVE-2019-12243, allows unauthorized access to resources. It is crucial to upgrade Istio to version 1.1.7 or later to mitigate this vulnerability. For further support on vulnerability remediation, contact DevNack.com.
See every vulnerability recorded for istio.io/istio →
FAQ
Istio is an open-source service mesh platform that provides traffic management, security, and observability for microservices.
This vulnerability allows unauthorized access to certain resources in Istio, potentially leading to privilege escalation or unauthorized data exposure.
The CVSS score of this vulnerability is 8.9, indicating a high severity level.
To fix this vulnerability, it is recommended to upgrade Istio to version 1.1.7 or later.
There is no known workaround for this vulnerability. It is essential to apply the recommended fix by upgrading Istio to a secure version.
References
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