CVE-2026-28509 MEDIUM

CVE-2026-28509: LangBot has a Cross Site Scripting(XSS) Vulnerability

Vendor Langbot-App
Product LangBot
Weakness CWE-79 · XSS
Published March 6, 2026
Last update March 6, 2026
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N

What the vulnerability does

01Description

LangBot is a global IM bot platform designed for LLMs. Prior to version 4.8.7, LangBot’s web UI renders user-supplied raw HTML using rehypeRaw, which can lead to a cross-site scripting (XSS) vulnerability. This issue has been patched in version 4.8.7.

Key dates

02Disclosure timeline

March 6, 2026 CVE published
March 6, 2026 Record updated