RocketChat Rocket.Chat up to 8.7.1 DDP Rate Limiter sendForgotPasswordEmail allocation of resources

Summaryinfo

A vulnerability marked as critical has been reported in RocketChat Rocket.Chat up to 8.7.1. This impacts the function sendForgotPasswordEmail of the file /api/v1/method.callAnon/sendForgotPasswordEmail of the component DDP Rate Limiter. This manipulation causes allocation of resources. The identification of this vulnerability is CVE-2026-75575. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in RocketChat Rocket.Chat up to 8.7.1. It has been declared as critical. Affected by this vulnerability is the function sendForgotPasswordEmail of the file /api/v1/method.callAnon/sendForgotPasswordEmail of the component DDP Rate Limiter. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-75575 since 08/18/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 7.10.15, 8.1.8, 8.2.8, 8.3.8, 8.4.6, 8.5.3, 8.6.2, 8.7.2 or 8.8.0 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Chat Software

Vendor

• RocketChat

Name

• Rocket.Chat

Version

• 7.10.0
• 7.10.1
• 7.10.2
• 7.10.3
• 7.10.4
• 7.10.5
• 7.10.6
• 7.10.7
• 7.10.8
• 7.10.9
• 7.10.10
• 7.10.11
• 7.10.12
• 7.10.13
• 7.10.14
• 8.1.0
• 8.1.1
• 8.1.2
• 8.1.3
• 8.1.4
• 8.1.5
• 8.1.6
• 8.1.7
• 8.2.0
• 8.2.1
• 8.2.2
• 8.2.3
• 8.2.4
• 8.2.5
• 8.2.6
• 8.2.7
• 8.3.0
• 8.3.1
• 8.3.2
• 8.3.3
• 8.3.4
• 8.3.5
• 8.3.6
• 8.3.7
• 8.4.0
• 8.4.1
• 8.4.2
• 8.4.3
• 8.4.4
• 8.4.5
• 8.5.0
• 8.5.1
• 8.5.2
• 8.6.0
• 8.6.1
• 8.7.0
• 8.7.1

License

• free

Website

• Product: https://github.com/RocketChat/Rocket.Chat/

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