CVE-2026-28509

medium

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.

References

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

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

Details

Source: Mitre, NVD

Published: 2026-03-06

Updated: 2026-03-16

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.4

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

Severity: Medium

EPSS

EPSS: 0.00032