{"id":"CVE-2026-55164","state":"PUBLISHED","title":"Lemur: Plaintext password storage in Lemur user-update path","description":"Lemur manages TLS certificate creation. Prior to 1.9.2, lemur.users.service.update assigned a replacement password directly to users.password, while lemur/users/models.py registered User.hash_password only for the before_insert event. Because no before_update listener ran, administrator-initiated password changes through PUT /api/1/users/ were committed as plaintext. The affected user could no longer authenticate normally because bcrypt verification received an unhashed value. A database, backup, replica, query-log, or administrative read compromise exposed immediately usable credentials without offline cracking. The fix registers hashing for before_update and avoids rehashing values that already have a bcrypt prefix. This issue is fixed in version 1.9.2.","publishedAt":"2026-08-18T18:53:12.483Z","updatedAt":"2026-08-18T19:15:10.532Z","severity":{"score":4.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["Netflix lemur"],"affected":[{"vendor":"Netflix","product":"lemur","versions":[{"version":"< 1.9.2","status":"affected"}]}],"references":["https://github.com/Netflix/lemur/security/advisories/GHSA-q437-g7fv-2jvv","https://github.com/Netflix/lemur/commit/221c6d7275ac667bb8898ab48d2b96926a89c1c4","https://github.com/Netflix/lemur/releases/tag/v1.9.2"],"weaknesses":["CWE-256"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55164.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55164","state":"PUBLISHED","datePublished":"2026-08-18T18:53:12.483Z","dateUpdated":"2026-08-18T19:15:10.532Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T15:13:28.165Z"},"containers":{"cna":{"title":"Lemur: Plaintext password storage in Lemur user-update path","descriptions":[{"lang":"en","value":"Lemur manages TLS certificate creation. Prior to 1.9.2, lemur.users.service.update assigned a replacement password directly to users.password, while lemur/users/models.py registered User.hash_password only for the before_insert event. Because no before_update listener ran, administrator-initiated password changes through PUT /api/1/users/ were committed as plaintext. The affected user could no longer authenticate normally because bcrypt verification received an unhashed value. A database, backup, replica, query-log, or administrative read compromise exposed immediately usable credentials without offline cracking. The fix registers hashing for before_update and avoids rehashing values that already have a bcrypt prefix. This issue is fixed in version 1.9.2."}],"affected":[{"vendor":"Netflix","product":"lemur","versions":[{"version":"< 1.9.2","status":"affected"}]}],"references":[{"url":"https://github.com/Netflix/lemur/security/advisories/GHSA-q437-g7fv-2jvv","name":"https://github.com/Netflix/lemur/security/advisories/GHSA-q437-g7fv-2jvv","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/Netflix/lemur/commit/221c6d7275ac667bb8898ab48d2b96926a89c1c4","name":"https://github.com/Netflix/lemur/commit/221c6d7275ac667bb8898ab48d2b96926a89c1c4","tags":["x_refsource_MISC"]},{"url":"https://github.com/Netflix/lemur/releases/tag/v1.9.2","name":"https://github.com/Netflix/lemur/releases/tag/v1.9.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-256","lang":"en","description":"CWE-256: Plaintext Storage of a Password","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-18T18:53:12.483Z"},"source":{"advisory":"GHSA-q437-g7fv-2jvv","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/Netflix/lemur/security/advisories/GHSA-q437-g7fv-2jvv","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T19:15:04.584664Z","id":"CVE-2026-55164","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-18T19:15:10.532Z"}}]}}}