CVE-2026-75575: Rocketchat Rocket.chat

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Rocket.Chat exposes the sendForgotPasswordEmail Meteor method without a DDP rate limit, so an unauthenticated caller may invoke it as often as it likes. The method is reachable over DDP and over the HTTP route POST /api/v1/method.callAnon/sendForgotPasswordEmail, and it triggers a password reset message for any address that matches an account. With no DDPRateLimiter rule registered for it, a caller can drive an unbounded volume of reset mail at a chosen address from the deployment's own mail sender, and can probe addresses at scale: the method answers true for an address with no account and for a successful send, but false when the address belongs to an account that authenticates through an external provider and Accounts_AllowPasswordChangeForOAuthUsers is off, so repeated calls distinguish that class of account. Later versions register a rule permitting ten calls per minute per client address.

Affected products

• Rocketchat Rocket.chat: before 7.10.15 (fixed in 7.10.15); from 8.0.0, before 8.1.8 (fixed in 8.1.8); from 8.2.0, before 8.2.8 (fixed in 8.2.8); from 8.3.0, before 8.3.8 (fixed in 8.3.8); from 8.4.0, before 8.4.6 (fixed in 8.4.6); from 8.5.0, before 8.5.3 (fixed in 8.5.3); …

Published 2026-08-25. Last modified 2026-09-10.