kipper 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.
| Link | Resource |
|---|---|
| https://github.com/zalando/skipper/commit/0b52894570773b29e2f3c571b94b4211ef8fa714 | Patch |
| https://github.com/zalando/skipper/releases/tag/v0.23.0 | Product Release Notes |
| https://github.com/zalando/skipper/security/advisories/GHSA-cc8m-98fm-rc9g | Exploit Vendor Advisory Mitigation |
18 Feb 2026, 16:28
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/zalando/skipper/commit/0b52894570773b29e2f3c571b94b4211ef8fa714 - Patch | |
| References | () https://github.com/zalando/skipper/releases/tag/v0.23.0 - Product, Release Notes | |
| References | () https://github.com/zalando/skipper/security/advisories/GHSA-cc8m-98fm-rc9g - Exploit, Vendor Advisory, Mitigation | |
| First Time |
Zalando skipper
Zalando |
|
| CPE | cpe:2.3:a:zalando:skipper:*:*:*:*:*:*:*:* |
16 Jan 2026, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Published : 2026-01-16 20:15
Updated : 2026-02-18 16:28
NVD link : CVE-2026-23742
Mitre link : CVE-2026-23742
CVE.ORG link : CVE-2026-23742
JSON object : View