CVE-2026-106107: Quasar Framework App Vite SSR And SSG Vulnerability

HIGH
Advisory Identifier: GHSA-5m6h-8g35-p3m7
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CWE-116 CWE-79
Published
Advisory Summary

CVE-2026-106107 is a HIGH app vite ssr and ssg vulnerability (CWE-116: Improper Encoding or Escaping of Output) affecting Quasar Framework libraries in the npm ecosystem. The issue involves app vite ssr and ssg nonce attributes are not safely constrained. Remediation is available by upgrading affected packages to version 3.3.0.

CVE-2026-106107 at a Glance

CVE Identifier CVE-2026-106107
GHSA Identifier GHSA-5m6h-8g35-p3m7
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-116: Improper Encoding or Escaping of Output
Affected Product Quasar Framework
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-106107

To remediate this vulnerability, upgrade all affected Quasar Framework dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

@quasar/app-vite fixed: 3.3.0 
npm install @quasar/app-vite@3.3.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls @quasar/app-vite

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-106107, inspect your project dependencies using npm:

npm ls @quasar/app-vite

Analyze the terminal output to locate any version of Quasar Framework in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.3.0), your application is affected.

Note: The npm ls @quasar/app-vite command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-116: Improper Encoding or Escaping of Output, where the product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. as a result, the intended structure of the message is not preserved. In Quasar Framework, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Several @quasar/app-vite SSR and SSG renderer paths interpolate `ssrContext.nonce` directly into quoted HTML attributes. An application that derives or overrides the nonce using untrusted data can allow a quote to terminate the nonce attribute and inject additional attributes or markup into generated HTML. Cryptographically generated base64 or base64url nonces are not directly affected because they do not contain HTML attribute delimiters. Exploitation requires an application to place attacker-controlled or otherwise unsafe data in `ssrContext.nonce`. The remediation centralizes nonce handling across development SSR/SSG, production SSR, production SSG, critical CSS, store-state scripts, and Vue Devtools. It validates the value as a non-empty base64/base64url CSP nonce and HTML-encodes the attribute value before rendering.

CVE-2026-106107 Affected Quasar Framework Versions

1 component(s)
Fixed Versions:
3.3.0
Product / Package Ecosystem Affected Versions Fixed Version
@quasar/app-vite
npm/@quasar/app-vite
npm
< 3.3.0
3.3.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/quasarframework/quasar/security/advisories/GHSA-5m6h-8g35-p3m7
NVD — CVE-2026-106107 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-106107
Security Fix Commit FIX COMMIT
https://github.com/quasarframework/quasar/commit/91271c38859bec51e154b60c24497a637ce903d7
Quasar Framework Source Repository REPOSITORY
https://github.com/quasarframework/quasar
Quasar Framework Release RELEASE
https://github.com/quasarframework/quasar/releases/tag/@quasar/app-vite-v3.3.0

Frequently Asked Questions

What is CVE-2026-106107?
CVE-2026-106107 is a security vulnerability in Quasar Framework involving App Vite SSR and SSG nonce attributes are not safely constrained under CWE-116: Improper Encoding or Escaping of Output.
Which Quasar Framework versions are affected?
Affected versions include releases prior to 3.3.0 across affected packages: @quasar/app-vite.
What version fixes CVE-2026-106107?
Upgrading to 3.3.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @quasar/app-vite affected?
Yes, @quasar/app-vite is affected in releases prior to 3.3.0. Upgrade your dependency to 3.3.0 or later.
What CWE is associated with CVE-2026-106107?
CVE-2026-106107 is classified under CWE-116: Improper Encoding or Escaping of Output (The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.).
How can I check npm dependencies for CVE-2026-106107?
Run the dependency tree command: 'npm ls @quasar/app-vite'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5m6h-8g35-p3m7",
  "modified" : "2026-10-07T16:16:03Z",
  "published" : "2026-10-07T16:16:03Z",
  "aliases" : [ "CVE-2026-106107" ],
  "summary" : "Quasar Framework: App Vite SSR and SSG nonce attributes are not safely constrained",
  "details" : "Several @quasar/app-vite SSR and SSG renderer paths interpolate `ssrContext.nonce` directly into quoted HTML attributes. An application that derives or overrides the nonce using untrusted data can allow a quote to terminate the nonce attribute and inject additional attributes or markup into generated HTML.\n\nCryptographically generated base64 or base64url nonces are not directly affected because they do not contain HTML attribute delimiters. Exploitation requires an application to place attacker-controlled or otherwise unsafe data in `ssrContext.nonce`.\n\nThe remediation centralizes nonce handling across development SSR/SSG, production SSR, production SSG, critical CSS, store-state scripts, and Vue Devtools. It validates the value as a non-empty base64/base64url CSP nonce and HTML-encodes the attribute value before rendering.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@quasar/app-vite"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.3.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.2.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/quasarframework/quasar/security/advisories/GHSA-5m6h-8g35-p3m7"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-106107"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/quasarframework/quasar/commit/91271c38859bec51e154b60c24497a637ce903d7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/quasarframework/quasar"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/quasarframework/quasar/releases/tag/@quasar/app-vite-v3.3.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-116", "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-07T16:16:03Z",
    "nvd_published_at" : "2026-10-06T18:16:52Z"
  }
}