Rocket.Chat up to 8.7.x Meteor DDP getThreadsList/getThreadMessages rid/tmid improper authorization

Summaryinfo

A vulnerability labeled as problematic has been found in Rocket.Chat up to 8.7.x. The affected element is the function getThreadsList/getThreadMessages of the component Meteor DDP. The manipulation of the argument rid/tmid results in improper authorization. This vulnerability is identified as CVE-2026-65645. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Rocket.Chat up to 8.7.x. It has been classified as problematic. Affected is the function getThreadsList/getThreadMessages of the component Meteor DDP. The manipulation of the argument rid/tmid with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality. CVE summarizes:

Rocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6. 8.3.8, 8.2.8, 8.1.8, and 7.10.15, the Meteor DDP methods getThreadsList and getThreadMessages accept rid / tmid as raw, untyped parameters with no schema validation. A MongoDB operator object (e.g. {"$gt": "4"}) can be substituted for a string room-id or message-id. The authorization check resolves to a room the attacker already has access to, while the downstream data query fans out across all rooms - disclosing private thread parents and their full reply content to any low-privilege authenticated user. The REST route chat.getThreadsList was patched in v5.0 (HackerOne report #1446767) by adding rid: {type:'string'} AJV validation. The equivalent DDP method was never given the same fix and remains exploitable

The advisory is available at hackerone.com. This vulnerability is traded as CVE-2026-65645 since 07/22/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

Upgrading to version 7.10.15, 8.2.8, 8.3.8, 8.4.6, 8.5.3, 8.6.2, 8.7.1 or 8.8.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-63805). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Chat Software

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
• 8.0
• 8.1
• 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
• 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
• 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
• 8.4.0
• 8.4.1
• 8.4.2
• 8.4.3
• 8.4.4
• 8.4.5
• 8.5
• 8.5.0
• 8.5.1
• 8.5.2
• 8.6
• 8.6.0
• 8.6.1
• 8.7
• 8.7.0

License

• free

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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