CVE-2023-28356

7.5 highEPSS 0.7%

High (7.5) in rocket.chat rocket.chat. EPSS 0.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWEs: CWE-400, CWE-770
Published: 2023-05-11
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

rocket.chat:rocket.chat

References

https://hackerone.com/reports/1461340
https://hackerone.com/reports/1461340

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