---
id: CVE-2026-106106
title: >-
  Quasar Framework is a framework for building high-performance Vue.js user
  interfaces
summary: >-
  Quasar Framework is a framework for building high-performance Vue.js user
  interfaces. Prior to @quasar/render-ssr-error 2.2.4 and @quasar/app-vite
  3.3.0, renderSSRError() in utils/render-ssr-error/src/index.js used diagnostic
  data from u…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:H/SA:N'
cwe:
  - CWE-79
  - CWE-497
vendor: quasarframework
product: quasar
affected:
  - quasar < 2.23.3
  - render-ssr-error < 2.2.4
  - app-vite < 3.3.0
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:03:40.690'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106106'
references:
  - url: >-
      https://github.com/quasarframework/quasar/commit/61c2bd8a607785fdade72cce20e8faf1de7eee15
    label: security-advisories@github.com
  - url: >-
      https://github.com/quasarframework/quasar/releases/tag/@quasar/app-vite-v3.3.0
    label: security-advisories@github.com
  - url: >-
      https://github.com/quasarframework/quasar/security/advisories/GHSA-r5mf-4r5x-q78f
    label: security-advisories@github.com
  - url: >-
      https://github.com/quasarframework/quasar/security/advisories/GHSA-r5mf-4r5x-q78f
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T18:22:31.217011Z'
cvssSource: cna
ingestedAt: '2026-10-06T18:11:36.238Z'
---

## Overview

Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to @quasar/render-ssr-error 2.2.4 and @quasar/app-vite 3.3.0, renderSSRError() in utils/render-ssr-error/src/index.js used diagnostic data from utils/render-ssr-error/src/env.js to serialize process.env, request headers, and cookies into the HTTP page returned by serve.devError(), while the development server listened on all interfaces by default. Any network-adjacent client that reaches an SSR or SSG render failure through this development-only error path can obtain shell environment secrets. The renderer escaped only one exact lowercase script closing-tag spelling, so case variants and valid closing-tag delimiter variants in reflected diagnostic data could terminate the script element and inject markup; executing the injected code in a developer browser additionally requires the payload to accompany that developer's request. This issue is fixed in @quasar/render-ssr-error 2.2.4 and @quasar/app-vite 3.3.0.

## Remediation

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