{"id":"CVE-2026-90562","summary":"LangBot before 4.10.11 Authentication Bypass via Weak Recovery Key","details":"LangBot before 4.10.11 generates password recovery keys with only 24 bits of entropy and applies no rate limiting to the unauthenticated reset-password endpoint. Remote attackers knowing the administrator email can exhaust the keyspace through concurrent requests to reset the admin password and gain account access.","modified":"2026-09-18T03:31:03.084910946Z","published":"2026-09-13T10:45:36.684Z","database_specific":{"cwe_ids":["CWE-331"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90562.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90562.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90562"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/langbot-before-4.10.11-authentication-bypass-via-weak-recovery-key"},{"type":"REPORT","url":"https://github.com/langbot-app/LangBot/issues/2392"},{"type":"FIX","url":"https://github.com/langbot-app/LangBot/commit/267232c24f93c515d6fd3f7f81c0676066ab1ab8"},{"type":"PACKAGE","url":"https://github.com/langbot-app/LangBot"},{"type":"ARTICLE","url":"https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/api/http/controller/groups/user.py"},{"type":"ARTICLE","url":"https://github.com/langbot-app/LangBot/blob/v4.10.2/src/langbot/pkg/core/stages/genkeys.py"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/langbot-app/langbot","events":[{"introduced":"a0b7d759ac8bfdd499dcf1f137c6df2fbcb3dd1c"},{"fixed":"273b8839b91cb74dfd083644efea18849a3fcee1"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.0.8.1"},{"fixed":"4.10.11"}]}}],"versions":["v4.10.10","v4.10.9","v4.10.8","v4.10.7","v4.10.6","v4.10.5","v4.10.4","v4.10.3","v4.10.2","v4.10.1","v4.10.0","v4.10.0-beta.3","v4.10.0-beta.2","v4.9.7","v4.9.6","v4.9.5","v4.9.4","v4.9.3","v4.9.2","v4.9.1","v4.9.0","v4.8.7","v4.8.6","v4.8.5","v4.8.4","v4.8.3","v4.8.2","v4.8.1","v4.8.0","v4.7.2","v4.7.1","v4.7.0","v4.6.5","v4.6.4","v4.6.3","v4.6.2","v4.6.1","v4.6.0","v4.5.4","v4.5.3","v4.5.1b3","v4.5.1b2","v4.5.1b1","v4.5.0","v4.4.2b1","v.4.4.2b1","v4.4.1","v4.4.0","v4.3.9","v4.3.8","v4.3.7","v4.3.7b1","v4.3.6","v4.3.5","v4.3.4","v4.3.3","v4.3.2","v4.3.1","v4.3.0","v4.2.2","v4.3.0.beta2","v4.2.1","v4.2.0","v4.1.2","v4.1.1","v4.1.0","v4.0.9","v4.0.8.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90562.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}