CVE-2026-65645
Rocket.Chat Insecure DDP Method Schema Validation Information Disclosure
Description
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
INFO
Published Date :
Aug. 21, 2026, 4:18 a.m.
Last Modified :
Aug. 21, 2026, 4:18 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-65645
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Rocket.Chat to version 8.8.0 or later.
- Apply the Meteor DDP method schema validation.
- Ensure authorization checks are applied correctly.
- Review data access controls for DDP methods.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-65645.
| URL | Resource |
|---|---|
| https://github.com/RocketChat/Rocket.Chat/pull/41814 | |
| https://hackerone.com/reports/3852135 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-65645 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-65645
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-65645 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-65645 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 21, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Rocket.Chat', 'product': 'Rocket.Chat', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '8.8.0', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.7.1', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.6.2', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.5.3', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.4.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.3.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.2.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.1.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.10.15', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description 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 Added Reference https://github.com/RocketChat/Rocket.Chat/pull/41814 Added Reference https://hackerone.com/reports/3852135