CVE-2026-28509

MediumCVSS 5.4/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Mar 6, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2026-28509: Medium severity, CVSS 5.4 | Vulnix