{"cve":"CVE-2026-23742","nvd":{"published":"2026-01-16T20:15:51.613","modified":"2026-06-17T10:22:01.943","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-94","CWE-250","CWE-522"],"references":["https://github.com/zalando/skipper/commit/0b52894570773b29e2f3c571b94b4211ef8fa714","https://github.com/zalando/skipper/releases/tag/v0.23.0","https://github.com/zalando/skipper/security/advisories/GHSA-cc8m-98fm-rc9g"],"products":["zalando:skipper"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2026-23742","score":0.00514,"percentile":0.43801,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-cc8m-98fm-rc9g","url":"https://osv.dev/vulnerability/GHSA-cc8m-98fm-rc9g","summary":"Skipper is vulnerable to arbitrary code execution through lua filters","modified":"2026-02-03T22:40:59.690453Z","packages":[{"ecosystem":"Go","name":"github.com/zalando/skipper","purl":"pkg:golang/github.com/zalando/skipper","ranges":["<0.23.0"],"fixed":["0.23.0"]}]},{"id":"GO-2026-4327","url":"https://osv.dev/vulnerability/GO-2026-4327","summary":"Skipper is vulnerable to arbitrary code execution through lua filters in github.com/zalando/skipper","modified":"2026-03-03T04:57:53.106890Z","packages":[{"ecosystem":"Go","name":"github.com/zalando/skipper","purl":"pkg:golang/github.com/zalando/skipper","ranges":["<0.23.0"],"fixed":["0.23.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}