CVE-2026-23742

HIGH

8.8

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.

CVE Details

CVSS v3.1 Score8.8

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published1/16/2026

Last Modified2/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

zalando:skipper

Weaknesses (CWE)

CWE-94CWE-250CWE-522

References

https://github.com/zalando/skipper/commit/0b52894570773b29e2f3c571b94b4211ef8fa714(security-advisories@github.com)

https://github.com/zalando/skipper/releases/tag/v0.23.0(security-advisories@github.com)

https://github.com/zalando/skipper/security/advisories/GHSA-cc8m-98fm-rc9g(security-advisories@github.com)

IOC Correlations

No correlations recorded

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