---
id: CVE-2026-12228
title: >-
  A stored cross-site scripting (XSS) vulnerability exists in the `POST
  /api/prompts/share` endpoint of parisneo/lollms (latest version)
summary: >-
  A stored cross-site scripting (XSS) vulnerability exists in the `POST
  /api/prompts/share` endpoint of parisneo/lollms (latest version). The endpoint
  stores attacker-controlled `prompt_content` into `DBDirectMessage.content`
  without serve…
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'
cwe:
  - CWE-79
published: '2026-07-18'
updated: '2026-07-18'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-12228'
references:
  - url: 'https://huntr.com/bounties/25623635-5ceb-4062-8289-02089e6d97c1'
    label: security@huntr.dev
tags:
  - nvd
ingestedAt: '2026-07-19T08:30:40.131Z'
epss: 0.00334
epssPercentile: 0.24119
---

## Overview

A stored cross-site scripting (XSS) vulnerability exists in the `POST /api/prompts/share` endpoint of parisneo/lollms (latest version). The endpoint stores attacker-controlled `prompt_content` into `DBDirectMessage.content` without server-side sanitization. When a victim opens the direct message (DM) thread, the message is rendered by the DM UI through `MessageContentRenderer`, which uses `v-html` to insert rendered HTML into the DOM. The frontend sanitizer, which is regex-based, fails to comprehensively sanitize attacker-controlled HTML, allowing malicious payloads to execute in the victim's browser context. This vulnerability enables any authenticated user to send a malicious prompt-share message to another user's inbox, leading to arbitrary JavaScript execution, authenticated actions as the victim, exposure of same-origin application data, and potential account takeover.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.