---
title: "CVE-2026-23733: Lobe Chat affected by Cross-Site Scripting(XSS) that can escalate to Remote Code Execution(RCE)"
url: https://erroneo.us/security/cve/CVE-2026-23733/
description: "CVE-2026-23733 (@lobehub/chat (npm)): LobeChat is an open source chat application platform. Prior to version 2.0.0-next.180, a stored Cross-Site Scripting…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-01-18
date_modified: 2026-02-05
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-23733"
kev: false
cvss: 6.4
epss: 0.00146
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-23733: Lobe Chat affected by Cross-Site Scripting(XSS) that can escalate to Remote Code Execution(RCE)

**Signal:** Normal patch cycle. No exploitation signal; fix it in your next routine update if you are affected. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.1% , percentile 4: FIRST’s model estimates a 0.1% chance of exploitation activity in the next 30 days, higher than 4% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
- Only applies if your dependency tree includes @lobehub/chat (npm) <= 1.143.2, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

LobeChat is an open source chat application platform. Prior to version 2.0.0-next.180, a stored Cross-Site Scripting (XSS) vulnerability in the Mermaid artifact renderer allows attackers to execute arbitrary JavaScript within the application context. This XSS can be escalated to Remote Code Execution (RCE) by leveraging the exposed electronAPI IPC bridge, allowing attackers to run arbitrary system commands on the victim's machine. Version 2.0.0-next.180 patches the issue.

## Affected packages

- npm `@lobehub/chat` <= 1.143.2 → fixed: none listed

## Affected products (CVE record)

- lobehub lobe-chat: < 2.0.0-next.180

## Severity

- GitHub_M CVSS 3.1: 6.4 `CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:L/A:L`
- GitHub CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.15% probability of exploitation activity in the next 30 days; percentile 4.

## Sources

- [GitHub Advisory GHSA-4gpc-rhpj-9443](https://github.com/advisories/GHSA-4gpc-rhpj-9443)
- [CVE.org record CVE-2026-23733](https://www.cve.org/CVERecord?id=CVE-2026-23733)
- [NVD entry CVE-2026-23733](https://nvd.nist.gov/vuln/detail/CVE-2026-23733)
- [github.com](https://github.com/lobehub/lobe-chat/security/advisories/GHSA-4gpc-rhpj-9443)
- [github.com](https://github.com/lobehub/lobehub/security/advisories/GHSA-4gpc-rhpj-9443)

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Source page: https://erroneo.us/security/cve/CVE-2026-23733/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt