Unrated severityNVD Advisory· Published Jul 17, 2026· Updated Jul 21, 2026
Maybe 0.6.0 Missing Authorization via HostingsController show/update
CVE-2026-63100
Description
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.
Affected products
1Patches
Vulnerability mechanics
References
2- github.com/geo-chen/oss/blob/main/maybe.mdmitretechnical-descriptionexploit
- www.vulncheck.com/advisories/maybe-missing-authorization-via-hostingscontroller-show-updatemitrethird-party-advisory
News mentions
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