CVE-2026-59825
HIGH
7,4
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: none
Description
AI Translation Available
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.
295
Improper Certificate Validation
DraftCommon Consequences
Security Scopes Affected:
Integrity
Authentication
Potential Impacts:
Bypass Protection Mechanism
Gain Privileges Or Assume Identity
Applicable Platforms
Technologies:
Not Technology-Specific, Web Based, Mobile
https://github.com/mastodon/mastodon/commit/2ccb6ef277e725d1932295690cf8ab9d3dc…
https://github.com/mastodon/mastodon/commit/5748d0b16ea09001e0933f76c7afe814e09…
https://github.com/mastodon/mastodon/commit/761c61b42590a2fd91442fc15a0a7583e48…
https://github.com/mastodon/mastodon/pull/39571
https://github.com/mastodon/mastodon/releases/tag/v4.4.19
https://github.com/mastodon/mastodon/releases/tag/v4.5.12
https://github.com/mastodon/mastodon/security/advisories/GHSA-3rhr-8phh-jm86