High severity8.8OSV Advisory· Published Jan 16, 2026· Updated Jun 17, 2026
CVE-2026-23742
CVE-2026-23742
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/zalando/skipperGo | < 0.23.0 | 0.23.0 |
Affected products
5- ghsa-coords3 versionspkg:golang/github.com/zalando/skipperpkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 0.23.0+ 2 more
- (no CPE)range: < 0.23.0
- (no CPE)range: < 0.0.20260205T172317-150000.1.146.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
5- github.com/zalando/skipper/commit/0b52894570773b29e2f3c571b94b4211ef8fa714nvdPatchWEB
- github.com/zalando/skipper/security/advisories/GHSA-cc8m-98fm-rc9gnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-cc8m-98fm-rc9gghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-23742ghsaADVISORY
- github.com/zalando/skipper/releases/tag/v0.23.0nvdProductRelease NotesWEB
News mentions
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