CVE-2026-23742
Skipper arbitrary code execution through lua filters
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 8.8EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
16 Jan 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
zalando · skipperWant to know if your infrastructure is exposed to this?
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