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Medium severity6.3NVD Advisory· Published Mar 6, 2026· Updated Jun 17, 2026

CVE-2026-28509

CVE-2026-28509

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 products

3
  • LangBot/LangBot2 versions
    cpe:2.3:a:langbot:langbot:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:langbot:langbot:*:*:*:*:*:*:*:*range: <4.8.7
    • (no CPE)range: <4.8.7
  • Apboard/Langbotv5
    Range: < 4.8.7

Patches

Vulnerability mechanics

References

2

News mentions

0

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