{"cve":"CVE-2023-48312","nvd":{"published":"2023-11-24T18:15:07.127","modified":"2026-06-17T06:33:59.143","status":"Modified","description":"capsule-proxy is a reverse proxy for the capsule operator project. Affected versions are subject to a privilege escalation vulnerability which is based on a missing check if the user is authenticated based on the `TokenReview` result. All the clusters running with the `anonymous-auth` Kubernetes API Server setting disable (set to `false`) are affected since it would be possible to bypass the token review mechanism, interacting with the upper Kubernetes API Server. This privilege escalation cannot be exploited if you're relying only on client certificates (SSL/TLS). This vulnerability has been addressed in version 0.4.6. Users are advised to upgrade.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287"],"references":["https://github.com/projectcapsule/capsule-proxy/commit/472404f7006a4152e4eec76dee07324dd1e6e823","https://github.com/projectcapsule/capsule-proxy/security/advisories/GHSA-fpvw-6m5v-hqfp","https://github.com/projectcapsule/capsule-proxy/commit/472404f7006a4152e4eec76dee07324dd1e6e823","https://github.com/projectcapsule/capsule-proxy/security/advisories/GHSA-fpvw-6m5v-hqfp"],"products":["clastix:capsule-proxy"],"source":"nvd","synced_at":"2026-10-19T21:42:07.670898610+00:00"},"epss":{"cve":"CVE-2023-48312","score":0.00574,"percentile":0.47386,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fpvw-6m5v-hqfp","url":"https://osv.dev/vulnerability/GHSA-fpvw-6m5v-hqfp","summary":"Capsule Proxy Authentication bypass using an empty token","modified":"2024-08-21T14:56:40.597662Z","packages":[{"ecosystem":"Go","name":"github.com/projectcapsule/capsule-proxy","purl":"pkg:golang/github.com/projectcapsule/capsule-proxy","ranges":["<0.4.6"],"fixed":["0.4.6"]},{"ecosystem":"Go","name":"github.com/clastix/capsule-proxy","purl":"pkg:golang/github.com/clastix/capsule-proxy","ranges":["<0.4.6"],"fixed":["0.4.6"]}]},{"id":"GO-2023-2351","url":"https://osv.dev/vulnerability/GO-2023-2351","summary":"Capsule Proxy Authentication bypass using an empty token in github.com/projectcapsule/capsule-proxy","modified":"2026-03-03T04:54:21.052786Z","packages":[{"ecosystem":"Go","name":"github.com/projectcapsule/capsule-proxy","purl":"pkg:golang/github.com/projectcapsule/capsule-proxy","ranges":["<0.4.6"],"fixed":["0.4.6"]}]}],"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."]}