{"schemaVersion":3,"id":"CVE-2026-55163","aliases":["GHSA-x3vf-mgxj-7785","PYSEC-2026-2591"],"status":"published","duplicateOf":null,"title":null,"description":"Lemur manages TLS certificate creation. Prior to 1.9.2, PUT /api/1/roles/ in lemur/roles/views.py:298 authorized updates with RoleMemberPermission(role_id), which allowed either an administrator or any existing member of the target role. The handler passed data[\"users\"] and data[\"name\"] to service.update, allowing a non-admin member to add or remove other users and rename the role. This enabled lateral privilege grants within roles that control certificate and authority access and could deny access by removing legitimate members. The DELETE handler already required admin_permission, confirming that the weaker PUT authorization was inconsistent. The fix applies the same administrator-only requirement to the PUT handler. This issue is fixed in version 1.9.2.","dates":{"published":"2026-08-18T18:50:58.130Z","modified":"2026-08-19T18:21:06.074Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":6.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","exploitability":7.2,"impact":5.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00216,"percentile":0.11323,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.051000000000000004,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00165},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00216,"percentile":0.11323}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00165,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00216,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00216,"percentile":0.11323}]},"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":"netflix","product":"lemur","name":"lemur","label":"lemur","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.9.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.9.2","eol":null,"hubHref":"/vendor/netflix/lemur"},{"vendor":"PyPI","product":"lemur","name":"lemur","label":"lemur","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/lemur","purlType":"pypi","versions":[{"text":"< 1.9.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.9.2","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/Netflix/lemur/security/advisories/GHSA-x3vf-mgxj-7785","label":"github.com/Netflix/lemur/security/advisories/GHSA-x3vf-mgxj-7785","hostname":"github.com","tags":["X Refsource CONFIRM","WEB"]},{"url":"https://github.com/Netflix/lemur/commit/9523a3b9cb3170ec9f795162b8c60e1ad3c4f9ce","label":"github.com/Netflix/lemur/commit/9523a3b9cb3170ec9f795162b8c60e1ad3c4f9ce","hostname":"github.com","tags":["X Refsource MISC"]},{"url":"https://github.com/Netflix/lemur/releases/tag/v1.9.2","label":"github.com/Netflix/lemur/releases/tag/v1.9.2","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/Netflix/lemur","label":"github.com/Netflix/lemur","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://pypi.org/project/lemur","label":"pypi.org/project/lemur","hostname":"pypi.org","tags":["PACKAGE"]},{"url":"https://github.com/advisories/GHSA-x3vf-mgxj-7785","label":"github.com/advisories/GHSA-x3vf-mgxj-7785","hostname":"github.com","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55163","label":"nvd.nist.gov/vuln/detail/CVE-2026-55163","hostname":"nvd.nist.gov","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-18T18:50:58.130Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-19T18:21:06.074Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":25,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T03:43:43.653Z","stale":false,"partial":false}}