CVE-2026-28509

Published: Mar 6, 2026Modified: Jun 17, 2026

5.4

Vector

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

Exploitability: 2.3 / Impact: 2.7

Source: NVD

Description

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.

Affected (1)

Products: Langbot: Langbot

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Langbot Langbot	Before 4.8.7

Related CWEs

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (2)

https://github.com/langbot-app/LangBot/commit/614621ab7b84fe50da3c6137705cde5a99429866

Source: security-advisories@github.com

Patch

https://github.com/langbot-app/LangBot/security/advisories/GHSA-w8gq-g4pc-xh3h

Source: security-advisories@github.com

ExploitVendor Advisory

Timeline

No history available yet.