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High · 7.1 CVE-2026-106106 EUVD-2026-93571GHSA-r5mf-4r5x-q78f

Quasar Framework: SSR/SSG dev error page discloses the full shell environment and its </script> escape is bypassable

Published Oct 6, 2026 · Updated Oct 6, 2026 · Assigned by GitHub_M

Description

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.

Affected products

VendorProductAffectedFixed
quasarframework quasar < 2.23.3 —
@quasar render-ssr-error < 2.2.4 —
@quasar app-vite < 3.3.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @quasar/app-vite < 3.3.0 3.3.0 GHSA-r5mf-4r5x-q78f
npm @quasar/render-ssr-error < 2.2.4 2.2.4 GHSA-r5mf-4r5x-q78f

References