CVE-2026-66749: lets-chat 0.4.0 through 0.4.8

CVE-2026-66749. CVSS 3.1 base score 6.5 (MEDIUM, Vendor/CNA). EPSS 0.00436 (percentile 0.36789), scored 22-Oct-2026.

Affected technology

lets-chat · 0.4.0 through 0.4.8, 84981a6d2534445c00ea4e095c934e46943c0b1d through 617207ff3c0c0bf8e3c7a915bd9ec03f1dd8390c
sdelements

Description’s affected range: through 0.4.8

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

Authenticated attackers can crash the server by supplying a valid 24-character hex string room parameter that matches no document in the database. Vendor/CNA’s CVSS 4.0 assessment (base score 7.1/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 24-Oct-2026 15:08 UTC

CWE: CWE-476
CCR priority: 26.1 /100 (P4)
CVSS 3.1: 6.5 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
EPSS: 0.00436 · percentile 0.36846 · 2026-10-24
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-24 15:09:16.138216+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-24 15:07:27.951960+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-66749.html