CVE-2026-75575

Summary

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 Software

Weaknesses

• CWE-307: Improper Restriction of Excessive Authentication Attempts
• CWE-204: Observable Response Discrepancy

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-7c6v-m68v-v73r
• https://github.com/RocketChat/Rocket.Chat
• https://github.com/RocketChat/Rocket.Chat/commit/3a61c3afe
• https://www.vulncheck.com/advisories/rocket-chat-missing-ddp-rate-limit-on-the-sendforgotpasswordemail-meteor-method

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