What is CVE-2026-66751?

CVE-2026-66751 is a medium-severity vulnerability in Sdelements Lets-chat, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-07-28.

How severe is CVE-2026-66751?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Sdelements Lets-chat

CVE-2026-66751

Let's Chat 0.3.0 through 0.4.8 contains an improper authorization vulnerability that allows any authenticated user to archive any room on the server by sending a DELETE request to the rooms handler without ownership verification. Attackers…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

Affected products

Sdelements Lets-chat — versions 0.3.0, 5b5f46f92696955c27864dbca8b33b5b6a39a502

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-66751?: CVE-2026-66751 is a medium-severity vulnerability in Sdelements Lets-chat, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-07-28.
How severe is CVE-2026-66751?: Medium severity. CVSS v3 base score is 5.4 out of 10.