CVE-2026-48616
Rocket.Chat Livechat File Access Control Bypass
Description
Rocket.Chat versions <8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, 7.13.9, 7.10.13 has an access control vulnerability in Livechat files. Protected file downloads at /file-upload/:fileId/:name authorize livechat access using rc_room_type=l with rc_rid+rc_token, but the authorization path does not verify that rc_rid matches the requested file's rid. Furthermore, :fileId is predictable via sequential MongoDB IDs, and :name can be anything, allowing unauthenticated discovery of all uploaded files.
INFO
Published Date :
June 17, 2026, 1:20 p.m.
Last Modified :
June 18, 2026, 7:05 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.0 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.0 | CRITICAL | [email protected] |
Solution
- Update Rocket.Chat to a version newer than 8.5.1.
- Apply vendor patches for affected versions.
- Verify file access controls.
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-2026-48616.
| URL | Resource |
|---|---|
| https://github.com/RocketChat/Rocket.Chat/pull/40889 | Issue Tracking Patch Third Party Advisory |
| https://hackerone.com/reports/3687142 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-48616 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-2026-48616
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-2026-48616 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-48616 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.
-
Initial Analysis by [email protected]
Jun. 18, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* versions up to (excluding) 7.10.13 *cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* versions from (including) 7.13.0 up to (excluding) 7.13.9 *cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.7 *cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* versions from (including) 8.1.0 up to (excluding) 8.1.6 *cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* versions from (including) 8.2.0 up to (excluding) 8.2.6 *cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* versions from (including) 8.3.0 up to (excluding) 8.3.6 *cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* versions from (including) 8.4.0 up to (excluding) 8.4.4 *cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* versions from (including) 8.5.0 up to (excluding) 8.5.1 Added Reference Type HackerOne: https://github.com/RocketChat/Rocket.Chat/pull/40889 Types: Issue Tracking, Patch, Third Party Advisory Added Reference Type HackerOne: https://hackerone.com/reports/3687142 Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-48616', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-17T15:01:32.537175Z'} -
New CVE Received by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Rocket.Chat', 'product': 'Rocket.Chat', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '8.5.1', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.4.4', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.3.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.2.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.1.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '8.0.7', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.13.9', 'versionType': 'semver'}, {'status': 'affected', 'version': '0', 'lessThan': '7.10.13', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description Rocket.Chat versions <8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, 7.13.9, 7.10.13 has an access control vulnerability in Livechat files. Protected file downloads at /file-upload/:fileId/:name authorize livechat access using rc_room_type=l with rc_rid+rc_token, but the authorization path does not verify that rc_rid matches the requested file's rid. Furthermore, :fileId is predictable via sequential MongoDB IDs, and :name can be anything, allowing unauthenticated discovery of all uploaded files. Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N Added CWE CWE-284 Added Reference https://github.com/RocketChat/Rocket.Chat/pull/40889 Added Reference https://hackerone.com/reports/3687142