CVE-2026-28509 is a cross-site scripting (XSS) vulnerability in LangBot, a global IM bot platform for LLMs, affecting versions prior to 4.8.7. The flaw arises from the web UI's use of rehypeRaw to render user-supplied raw HTML, allowing for malicious script injection. With a CVSS score of 6.3 (MEDIUM), successful exploitation requires user interaction and authenticated access, potentially leading to high confidentiality impact and low integrity impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.8.7CPE matchmatch criteria | cpe:2.3:a:langbot:langbot:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.