{"id":"CVE-2026-63100","summary":"Maybe 0.6.0 Missing Authorization via HostingsController show/update","details":"Maybe through 0.6.0 contains a missing authorization vulnerability that allows authenticated low-privilege member-role users to access and modify global hosting settings by exploiting unprotected show and update actions in the Settings::HostingsController, where the before_action ensure_admin filter is applied only to the clear_cache action. Attackers can read the operator's Synth API key rendered in plaintext via a form field value attribute, overwrite it with an attacker-controlled value, toggle public registration settings, and disable email confirmation requirements to disrupt the entire instance.","modified":"2026-07-22T05:29:53.290138311Z","published":"2026-07-17T15:45:05.695Z","database_specific":{"cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63100.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63100.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63100"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/maybe-missing-authorization-via-hostingscontroller-show-update"},{"type":"PACKAGE","url":"https://github.com/maybe-finance/maybe"},{"type":"EVIDENCE","url":"https://github.com/geo-chen/oss/blob/main/maybe.md"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/maybe-finance/maybe","events":[{"introduced":"0"},{"last_affected":"224f21354a916dfbec29e9435db1045b3d61a94b"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"0.6.0"}],"source":"AFFECTED_FIELD"}}],"versions":["v0.6.0","v0.5.0","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.0","v0.2.0","v0.2.0-alpha.2","v0.2.0-alpha.1","v0.1.0","v0.1.0-alpha.18","v0.1.0-alpha.17","v0.1.0-alpha.16","v0.1.0-alpha.15","v0.1.0-alpha.14","v0.1.0-alpha.13","v0.1.0-alpha.12","v0.1.0-alpha.11","v0.1.0-alpha.10","v0.1.0-alpha.9","v0.1.0-alpha.8","v0.1.0-alpha.7","v0.1.0-alpha.6","v0.1.0-alpha.5","v0.1.0-alpha.4","v0.1.0-alpha.3","v0.1.0-alpha.2","v0.1.0-alpha.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63100.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}