{"schemaVersion":3,"id":"CVE-2025-66406","aliases":["CGA-f8j4-968w-vv37","CGA-fj3f-76mc-hj23","CGA-jjqq-hhqv-cjv5","CGA-mm5c-4c9c-82jq","CGA-p625-5x9c-jv6g","CGA-rvcv-ch62-g5v8","GHSA-j7c9-79x7-8hpr","GO-2025-4181","CGA-5rgg-cv5p-m845"],"status":"published","duplicateOf":null,"title":null,"description":"Step CA is an online certificate authority for secure, automated certificate management for DevOps. Prior to 0.29.0, there is an improper authorization check for SSH certificate revocation. This affects deployments configured with the SSHPOP provisioner. This vulnerability is fixed in 0.29.0.","dates":{"published":"2025-12-03T19:13:48.240Z","modified":"2025-12-03T21:40:59.681Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Wolfi","score":5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H","exploitability":1.8,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Go","score":5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H","exploitability":1.8,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Chainguard","score":5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H","exploitability":1.8,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00151,"percentile":0.03902,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00151},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00151,"percentile":0.03902}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00151,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00151,"percentile":0.03902}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-863","name":"Incorrect Authorization","description":"The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/863.html"}],"affected":[{"vendor":"chainguard","product":"caddy","name":"caddy","label":"caddy","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/caddy","purlType":"apk","versions":[{"text":"< 2.10.2-r6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.2-r6","eol":null,"hubHref":null},{"vendor":"chainguard","product":"caddy-fips","name":"caddy-fips","label":"caddy-fips","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/caddy-fips","purlType":"apk","versions":[{"text":"< 2.10.2-r6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.2-r6","eol":null,"hubHref":null},{"vendor":"chainguard","product":"caddy-man","name":"caddy-man","label":"caddy-man","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/caddy-man","purlType":"apk","versions":[{"text":"< 2.10.2-r6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.2-r6","eol":null,"hubHref":null},{"vendor":"chainguard","product":"caddy-src","name":"caddy-src","label":"caddy-src","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/caddy-src","purlType":"apk","versions":[{"text":"< 2.10.2-r6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.2-r6","eol":null,"hubHref":null},{"vendor":"wolfi","product":"caddy","name":"caddy","label":"caddy","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/caddy","purlType":"apk","versions":[{"text":"< 2.10.2-r6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.2-r6","eol":null,"hubHref":null},{"vendor":"wolfi","product":"caddy-man","name":"caddy-man","label":"caddy-man","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/caddy-man","purlType":"apk","versions":[{"text":"< 2.10.2-r6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.2-r6","eol":null,"hubHref":null},{"vendor":"wolfi","product":"caddy-src","name":"caddy-src","label":"caddy-src","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/caddy-src","purlType":"apk","versions":[{"text":"< 2.10.2-r6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.10.2-r6","eol":null,"hubHref":null},{"vendor":"github.com/smallstep","product":"certificates","name":"github.com/smallstep/certificates","label":"certificates","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/smallstep/certificates","purlType":"golang","versions":[{"text":"< 0.29.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.29.0","eol":null,"hubHref":null},{"vendor":"smallstep","product":"certificates","name":"certificates","label":"certificates","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.29.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.29.0","eol":null,"hubHref":"/vendor/smallstep/certificates"}],"affectedCount":9,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr","label":"github.com/smallstep/certificates/security/advisories/GHSA-j7c9-79x7-8hpr","hostname":"github.com","tags":["X Refsource CONFIRM","Advisory","WEB"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66406.json","label":"github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66406.json","hostname":"github.com","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66406","label":"nvd.nist.gov/vuln/detail/CVE-2025-66406","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/smallstep/certificates","label":"github.com/smallstep/certificates","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:21483-1","SUSE-SU-2025:4395-1"],"duplicates":[],"related":["CGA-PR93-635X-RQ27","CGA-RH95-W3G3-PPH9","OPENSUSE-SU-2026:21483-1","SUSE-SU-2025:4395-1"]},"timeline":[{"kind":"published","date":"2025-12-03T19:13:48.240Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-12-03T21:40:59.681Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":20,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T09:27:37.218Z","stale":false,"partial":false}}