{"id":"CVE-2022-23652","aliases":["EUVD-2022-0936","GHSA-9cwv-cppx-mqjm","GO-2022-0329"],"status":"published","title":"Privilege escalation using hop-by-hop Connection header","description":"capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the `cluster-admin` Role bound to `capsule-proxy`. There are no known workarounds for this issue.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.01397,"percentile":0.72608,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-287"],"published":"2022-02-22T19:55:11Z","modified":"2026-10-28T02:30:56Z","fixes":[{"ecosystem":"Go","package":"github.com/clastix/capsule-proxy","fixed_in":["0.2.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/clastix/capsule-proxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/clastix/capsule-proxy","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.2.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/clastix/capsule-proxy","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.2.1"}]}]}],"products":[{"vendor":"clastix","product":"capsule-proxy"}],"references":[{"url":"https://github.com/clastix/capsule-proxy/security/advisories/GHSA-9cwv-cppx-mqjm","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/clastix/capsule-proxy/issues/188","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://github.com/clastix/capsule-proxy/commit/efe91f68ebf8a9e3d21491dc57da7b8a746415d8","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-23652","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-9cwv-cppx-mqjm"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/23xxx/CVE-2022-23652.json","tags":["advisory"]},{"url":"https://github.com/clastix/capsule-proxy","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2022-23652","title":"Privilege escalation using hop-by-hop Connection header","description":"capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the `cluster-admin` Role bound to `capsule-proxy`. There are no known workarounds for this issue.","status":"published","published":"2022-02-22T19:55:11Z","modified":"2025-04-22T18:21:44.645Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:34:29.478363Z"}],"euvd":[{"id":"EUVD-2022-0936","description":"capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the `cluster-admin` Role bound to `capsule-proxy`. There are no known workarounds for this issue.","status":"published","published":"2022-02-22T19:55:11Z","modified":"2025-04-22T18:21:44Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T20:52:15.026784Z"}],"ghsa":[{"id":"GHSA-9cwv-cppx-mqjm","title":"Improper Authentication in Capsule Proxy","description":"### Impact\n\nUsing a malicious `Connection` header, an attacker with a proper authentication mechanism could start a privilege escalation towards the Kubernetes API Server, being able to exploit the `cluster-admin` Role bound to `capsule-proxy`.\n\n### Patches\n\nPatch has been merged in the v0.2.1 release.\n\n### Workarounds\n\nUpgrading is mandatory.\n","status":"published","published":"2022-02-23T21:17:25Z","modified":"2023-02-03T05:06:26Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:36:43.439065Z"}],"nvd":[{"id":"CVE-2022-23652","description":"capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the `cluster-admin` Role bound to `capsule-proxy`. There are no known workarounds for this issue.","status":"published","published":"2022-02-22T20:15:07.763Z","modified":"2026-06-17T04:30:34.173Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:07:12.711288Z"}],"osv":[{"id":"CVE-2022-23652","title":"Privilege escalation using hop-by-hop Connection header","description":"capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the `cluster-admin` Role bound to `capsule-proxy`. There are no known workarounds for this issue.","status":"published","published":"2022-02-22T19:55:11Z","modified":"2026-10-28T02:30:56.368154925Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:44:24.061177Z"},{"id":"GHSA-9cwv-cppx-mqjm","title":"Improper Authentication in Capsule Proxy","description":"### Impact\n\nUsing a malicious `Connection` header, an attacker with a proper authentication mechanism could start a privilege escalation towards the Kubernetes API Server, being able to exploit the `cluster-admin` Role bound to `capsule-proxy`.\n\n### Patches\n\nPatch has been merged in the v0.2.1 release.\n\n### Workarounds\n\nUpgrading is mandatory.\n","status":"published","published":"2022-02-23T21:17:25Z","modified":"2024-08-21T14:56:38.322893Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:46:43.524801Z"},{"id":"GO-2022-0329","title":"Improper Authentication in Capsule Proxy in github.com/clastix/capsule-proxy","description":"Improper Authentication in Capsule Proxy in github.com/clastix/capsule-proxy","status":"published","published":"2024-08-21T14:30:29Z","modified":"2026-03-03T04:50:06.34248Z","updated_at":"2026-11-02T15:47:00.604718Z"}]}}