CVE-2026-23742
8.8 · HIGHOverview
CVE-2026-23742 is a high-severity vulnerability affecting zalando skipper. It was published on January 16, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
Skipper is an HTTP router and reverse proxy for service composition. The default skipper configuration before 0.23.0 was -lua-sources=inline,file. The problem starts if untrusted users can create lua filters, because of -lua-sources=inline , for example through a Kubernetes Ingress resource. The configuration inline allows these user to create a script that is able to read the filesystem accessible to the skipper process and if the user has access to read the logs, they an read skipper secrets. This vulnerability is fixed in 0.23.0.
Remediation
Check the references section for vendor advisories and patches from zalando. Update skipper to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| zalando | skipper | >= 0, < 0.23.0 | Affected |
Frequently Asked Questions
What is CVE-2026-23742?
CVE-2026-23742 is a high-severity vulnerability affecting zalando skipper. It was published on January 16, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2026-23742?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-23742?
Check the references section for vendor advisories and patches from zalando. Update skipper to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-23742?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-23742 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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