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Vulnerabilities CVE-2026-66749

CVE-2026-66749

High
Open
TLP:CLEAR

Let's Chat 0.4.0 - 0.4.8 Denial of Service via Null Dereference in Room Lookup

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Description

Let's Chat 0.4.0 through 0.4.8 contains a null dereference vulnerability that allows authenticated attackers to crash the server by supplying a valid 24-character hex string room parameter that matches no document in the database. Attackers can send a crafted GET /messages request causing an uncaught TypeError in an asynchronous Mongoose callback that terminates the Node.js server process, with the same defect reachable through multiple code paths including the socket.io interface.

Details

CVSS Score
7.1
EPSS Score
0.31%

23.7th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Confidence
90%
Published
Jul 28, 2026
Last Modified
Jul 28, 2026
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