CVE-2026-25151: @builder.io/qwik city Qwik City Has A CSRF Vulnerability

MODERATE
Advisory Identifier: GHSA-r666-8gjf-4v5f
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CVSS 5.9
CWE-352
Published
Advisory Summary

CVE-2026-25151 is a MODERATE (CVSS 5.9) qwik city has a csrf vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting @builder.io/qwik city libraries in the npm ecosystem. The issue involves qwik city has a csrf protection bypass via content-type header validation. Remediation is available by upgrading affected packages to version 1.19.0.

CVE-2026-25151 at a Glance

CVE Identifier CVE-2026-25151
GHSA Identifier GHSA-r666-8gjf-4v5f
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product @builder.io/qwik city
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-25151

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

@builder.io/qwik-city fixed: 1.19.0 
npm install @builder.io/qwik-city@1.19.0
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 @builder.io/qwik-city

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-25151, inspect your project dependencies using npm:

npm ls @builder.io/qwik-city

Analyze the terminal output to locate any version of @builder.io/qwik city in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.19.0), your application is affected.

Note: The npm ls @builder.io/qwik-city 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-352: Cross-Site Request Forgery (CSRF), where the web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. In @builder.io/qwik city, 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

### Summary Qwik City’s server-side request handler inconsistently interprets HTTP request headers, which can be abused by a remote attacker to circumvent form submission CSRF protections using specially crafted or multi-valued Content-Type headers. ### Impact A vulnerability in checkCSRF lets an attacker bypass Origin-based CSRF checks by using malformed or multi-valued Content-Type headers. Exploitation requires the CORS preflight to succeed (so it’s blocked if preflight is denied) and is possible when the application accepts cross-origin requests or via non-browser clients. Impact varies with server CORS and cookie policies and may enable unauthorized state changes.

CVE-2026-25151 Affected @builder.io/qwik city Versions

1 component(s)
Fixed Versions:
1.19.0
Product / Package Ecosystem Affected Versions Fixed Version
@builder.io/qwik-city
npm/@builder.io/qwik-city
npm
< 1.19.0
1.19.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/QwikDev/qwik/security/advisories/GHSA-r666-8gjf-4v5f
NVD — CVE-2026-25151 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-25151
Security Fix Commit FIX COMMIT
https://github.com/QwikDev/qwik/commit/eebf610e04cc3a690f11e10191d09ff0fca1c7ed
@builder.io/qwik city Source Repository REPOSITORY
https://github.com/QwikDev/qwik

Frequently Asked Questions

What is CVE-2026-25151?
CVE-2026-25151 is a security vulnerability in @builder.io/qwik city involving Qwik City has a CSRF Protection Bypass via Content-Type Header Validation under CWE-352: Cross-Site Request Forgery (CSRF).
Which @builder.io/qwik city versions are affected?
Affected versions include releases prior to 1.19.0 across affected packages: @builder.io/qwik-city.
What version fixes CVE-2026-25151?
Upgrading to 1.19.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @builder.io/qwik-city affected?
Yes, @builder.io/qwik-city is affected in releases prior to 1.19.0. Upgrade your dependency to 1.19.0 or later.
What is the CVSS score of CVE-2026-25151?
CVE-2026-25151 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N.
What CWE is associated with CVE-2026-25151?
CVE-2026-25151 is classified under CWE-352: Cross-Site Request Forgery (CSRF) (The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.).
How can I check npm dependencies for CVE-2026-25151?
Run the dependency tree command: 'npm ls @builder.io/qwik-city'. 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-r666-8gjf-4v5f",
  "modified" : "2026-02-04T17:45:47Z",
  "published" : "2026-02-03T20:49:58Z",
  "aliases" : [ "CVE-2026-25151" ],
  "summary" : "Qwik City has a CSRF Protection Bypass via Content-Type Header Validation",
  "details" : "### Summary\nQwik City’s server-side request handler inconsistently interprets HTTP request headers, which can be abused by a remote attacker to circumvent form submission CSRF protections using specially crafted or multi-valued Content-Type headers.\n\n### Impact\nA vulnerability in checkCSRF lets an attacker bypass Origin-based CSRF checks by using malformed or multi-valued Content-Type headers. Exploitation requires the CORS preflight to succeed (so it’s blocked if preflight is denied) and is possible when the application accepts cross-origin requests or via non-browser clients. Impact varies with server CORS and cookie policies and may enable unauthorized state changes.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@builder.io/qwik-city"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.19.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/QwikDev/qwik/security/advisories/GHSA-r666-8gjf-4v5f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-25151"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/QwikDev/qwik/commit/eebf610e04cc3a690f11e10191d09ff0fca1c7ed"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/QwikDev/qwik"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-03T20:49:58Z",
    "nvd_published_at" : "2026-02-03T22:16:30Z"
  }
}