CVE-2026-66749: high-severity vulnerability in sdelements lets-chat
Let's Chat 0.4.0 - 0.4.8 Denial of Service via Null Dereference in Room Lookup
Published
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41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.1epss 0.4%
from disclosure to weaponsame day
Published on NVDJul 28
1st PoCJul 26
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.
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
Affected products
sdelements · lets-chatpublic PoCs found — 2
githubgithub.com/theopaid/CVE-2026-66749-Unchecked-Room-Lookup-Leads-to-Server-Crash-Let-s-Chat-★ 0cve_referencegithub.com/theopaid/Unchecked-Room-Lookup-Leads-to-Server-Crash-Let-s-Chat-unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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