What’s Vulnerable › Vulnerabilities
CVE-2023-28356
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2023-05-11 · updated 2026-06-17
- Weakness: CWE-400
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.
Affected products
- Rocket.Chat: before 6.0.0 — fixed in 6.0.0
How to fix
Upgrade to a fixed version: Rocket.Chat 6.0.0. Check the vendor advisory for mitigations.
References
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