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9.1
CRITICAL CVSS 3.1
CVE-2026-45688
Rocket.Chat: Pre-Auth NoSQL Injection in CAS Login Handler leading to Arbitrary CAS/SAML User Session Hijack
Overview
Description

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's CAS login handler forwards the client-supplied options.cas.credentialToken value straight into a MongoDB findOne({_id: ...}) query without any runtime type check. TypeScript's string parameter annotation is erased at runtime, so an unauthenticated attacker can substitute a MongoDB query operator ({"$gt": ""}, {"$ne": null}, etc.) for what the server expects to be an opaque ticket string. The injected operator matches the first unexpired document in the credential_tokens collection, bypassing the CAS ticket check entirely. When any legitimate CAS or SAML SSO login is in flight, the attacker's next DDP login call matches the same credential-token row via the NoSQL operator and is issued a full Meteor auth token (userId + token) bound to the victim. The token is immediately usable against the complete REST and DDP surface as that user. If the victim is an administrator, this escalates to full instance compromise via Apps-Engine app install. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.

Details
INFO

Published Date :

June 24, 2026, 9:16 p.m.

Last Modified :

Nov. 3, 2026, 11:17 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-45688 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.

ID Vendor Product Action
1 Rocket.chat rocket.chat
1 Rocketchat rocket.chat
: Total Affected Vendor : 2 | Products : 2
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 CRITICAL [email protected]
Solution
Update Rocket.Chat to a patched version to fix MongoDB injection vulnerability.
  • Update Rocket.Chat to version 8.5.0 or later.
  • Apply patches for versions 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, or 7.10.11.
  • Verify CAS login handler input for type safety.
  • Sanitize user-supplied input to MongoDB queries.
References
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-2026-45688.

URL Resource
https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-rr54-jf4h-6cj9
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-45688 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-2026-45688 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-2026-45688 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-45688 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.

  • CVE Modified by [email protected]

    Nov. 03, 2026

    Action Type Old Value New Value
    Added Reference https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-rr54-jf4h-6cj9
    Removed Reference https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-rr54-jf4h-6cj9
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Nov. 03, 2026

    Action Type Old Value New Value
    Removed SSVC {'id': 'CVE-2026-45688', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-25T00:00:00+00:00'}
    Added SSVC {'id': 'CVE-2026-45688', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-26T03:55:38.005115Z'}
  • CVE Translated by [email protected]

    Oct. 25, 2026

    Action Type Old Value New Value
    Added Translation Title: Rocket.Chat de RocketChat, Description: Rocket.Chat es una plataforma de comunicaciones de código abierto, segura y totalmente personalizable. Antes de 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7 y 7.10.11, el gestor de inicio de sesión CAS de Rocket.Chat reenvía el valor options.cas.credentialToken proporcionado por el cliente directamente a una consulta MongoDB findOne({_id: ...}) sin ninguna verificación de tipo en tiempo de ejecución. La anotación de parámetro de cadena de TypeScript se borra en tiempo de ejecución, por lo que un atacante no autenticado puede sustituir un operador de consulta de MongoDB ({“$gt”: “”}, {“$ne”: null}, etc.) por lo que el servidor espera que sea una cadena de ticket opaca. El operador inyectado coincide con el primer documento no caducado en la colección credential_tokens, eludiendo por completo la verificación del ticket CAS. Cuando cualquier inicio de sesión legítimo de CAS o SAML SSO está en curso, la siguiente llamada de inicio de sesión DDP del atacante coincide con la misma fila de token de credencial a través del operador NoSQL y se le emite un token de autenticación completo de Meteor (userId + token) vinculado a la víctima. El token es inmediatamente utilizable contra toda la superficie REST y DDP como ese usuario. Si la víctima es un administrador, esto escala a un compromiso completo de la instancia a través de la instalación de una aplicación de Apps-Engine. Esta vulnerabilidad se corrige en 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7 y 7.10.11.
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jun. 26, 2026

    Action Type Old Value New Value
    Changed SSVC {'id': 'CVE-2026-45688', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-25T23:06:47.395008Z'} {'id': 'CVE-2026-45688', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-25T00:00:00+00:00'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jun. 26, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-45688', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-25T23:06:47.395008Z'}
  • New CVE Received by [email protected]

    Jun. 24, 2026

    Action Type Old Value New Value
    Added Affected [{'vendor': 'RocketChat', 'product': 'Rocket.Chat', 'versions': [{'status': 'affected', 'version': '>= 8.5.0-rc.0, < 8.5.0'}, {'status': 'affected', 'version': '>= 8.4.0-rc.0, < 8.4.1'}, {'status': 'affected', 'version': '>= 8.3.0-rc.0, < 8.3.3'}, {'status': 'affected', 'version': '>= 8.2.0-rc.0, < 8.2.3'}, {'status': 'affected', 'version': '>= 8.1.0-rc.0, < 8.1.4'}, {'status': 'affected', 'version': '>= 8.0.0-rc.0, < 8.0.5'}, {'status': 'affected', 'version': '>= 7.11.0-rc.0, < 7.13.7'}, {'status': 'affected', 'version': '< 7.10.11'}]}]
    Added Description Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's CAS login handler forwards the client-supplied options.cas.credentialToken value straight into a MongoDB findOne({_id: ...}) query without any runtime type check. TypeScript's string parameter annotation is erased at runtime, so an unauthenticated attacker can substitute a MongoDB query operator ({"$gt": ""}, {"$ne": null}, etc.) for what the server expects to be an opaque ticket string. The injected operator matches the first unexpired document in the credential_tokens collection, bypassing the CAS ticket check entirely. When any legitimate CAS or SAML SSO login is in flight, the attacker's next DDP login call matches the same credential-token row via the NoSQL operator and is issued a full Meteor auth token (userId + token) bound to the victim. The token is immediately usable against the complete REST and DDP surface as that user. If the victim is an administrator, this escalates to full instance compromise via Apps-Engine app install. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    Added CWE CWE-943
    Added Reference https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-rr54-jf4h-6cj9
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 9.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact