{"id":"BIT-mastodon-2026-59825","summary":"Mastodon: Unwanted deactivation of SSL/TLS certificate verification","details":"Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.19 and from 4.5.0 until 4.5.12, Mastodon's app/models/concerns/user/ldap_authenticable.rb mutates OpenSSL::SSL::SSLContext::DEFAULT_PARAMS when LDAP authentication uses LDAP_TLS_NO_VERIFY=true, disabling SSL and TLS certificate verification globally for requests made by puma web processes while sidekiq background jobs remain unaffected. This issue is fixed in versions 4.4.19 and 4.5.12.","aliases":["CVE-2026-59825","GHSA-3rhr-8phh-jm86"],"modified":"2026-08-24T08:25:58.578087443Z","published":"2026-08-24T05:45:37.108Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"https://github.com/mastodon/mastodon/commit/2ccb6ef277e725d1932295690cf8ab9d3dc03149"},{"type":"WEB","url":"https://github.com/mastodon/mastodon/commit/5748d0b16ea09001e0933f76c7afe814e09652ef"},{"type":"WEB","url":"https://github.com/mastodon/mastodon/commit/761c61b42590a2fd91442fc15a0a7583e48bbea4"},{"type":"WEB","url":"https://github.com/mastodon/mastodon/pull/39571"},{"type":"WEB","url":"https://github.com/mastodon/mastodon/releases/tag/v4.4.19"},{"type":"WEB","url":"https://github.com/mastodon/mastodon/releases/tag/v4.5.12"},{"type":"WEB","url":"https://github.com/mastodon/mastodon/security/advisories/GHSA-3rhr-8phh-jm86"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59825"}],"affected":[{"package":{"name":"mastodon","ecosystem":"Bitnami","purl":"pkg:bitnami/mastodon"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.4.19"},{"introduced":"4.5.0"},{"fixed":"4.5.12"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/mastodon/BIT-mastodon-2026-59825.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}],"schema_version":"1.9.0"}