High 7.1Published Oct 6, 2026

CVE-2026-106106Quasar Framework: SSR/SSG dev error page discloses the full shell environment and its </script> escape is bypassable

Updated under an hour ago (2026-10-19 07:30 UTC)

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It affects quasarframework quasar and 2 other products. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.28%, higher than 19% of scored CVEs.

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Every CVE for quasarframework quasar

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-79, CWE-497
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.28% (percentile 19)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

quasarframework quasar quasarframework:quasar (from the name)	before 2.23.3	CNA record
@quasar render-ssr-error quasar:render_ssr_error (from the name)	before 2.2.4	CNA record
@quasar app-vite quasar:app_vite (from the name)	before 3.3.0	CNA record

References

https://github.com/quasarframework/quasar/security/advisories/GHSA-r5mf-4r5x-q78fx-refsource-confirm
https://github.com/quasarframework/quasar/commit/61c2bd8a607785fdade72cce20e8faf1de7eee15x-refsource-misc
https://github.com/quasarframework/quasar/releases/tag/@quasar/app-vite-v3.3.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.