CVE-2023-28356

HIGH

rocket.chat < 6.0.0 - Denial of Service via Malicious Message Processing

Title source: llm

Description

A vulnerability has been identified where a maliciously crafted message containing a specific chain of characters can cause the chat to enter a hot loop on one of the processes, consuming ~120% CPU and rendering the service unresponsive.

References (1)

Core 1

Core References

Third Party Advisory

https://hackerone.com/reports/1461340

Scores

CVSS v3 7.5

EPSS 0.0072

EPSS Percentile 48.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-400 CWE-770

Status published

Products (1)

rocket.chat/rocket.chat < 6.0.0

Published May 11, 2023

Tracked Since Feb 18, 2026