CVE-2025-5892: RocketChat parseMessage.js parseMessage redos

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-09 · updated 2026-06-17
Weakness: CWE-400

Description

A vulnerability, which was classified as problematic, has been found in RocketChat up to 7.6.1. This issue affects the function parseMessage of the file /apps/meteor/app/irc/server/servers/RFC2813/parseMessage.js. The manipulation of the argument line leads to inefficient regular expression complexity. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products

Rocket.Chat: through 7.6.1

References

https://gist.github.com/mmmsssttt404/0fcda3b3e85edafc4eaa6816aa252deb
https://github.com/RocketChat/Rocket.Chat/pull/35711
https://vuldb.com/?ctiid.311663
https://vuldb.com/?id.311663
https://vuldb.com/?submit.585751
https://github.com/RocketChat/Rocket.Chat/pull/35711

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