CVE-2026-28509
LangBot has a Cross Site Scripting(XSS) Vulnerability
CVSS Score
6.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | langbot-app |
| Product | langbot |
| Published | Mar 6, 2026 |
| Last Updated | Mar 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
langbot-app / LangBot
< 4.8.7