GHSA-QWWW-VCR4-C8H2

Vulnerability from github – Published: 2026-07-24 16:44 – Updated: 2026-07-24 16:44
VLAI
Summary
React Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response
Details

This is a follow up to CVE-2026-22030 to address related CSRF flows in unstable RSC code paths.

[!NOTE] This only affects your application if you are using the unstable RSC APIs

Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-router"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.12.0"
            },
            {
              "fixed": "8.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-352"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T16:44:43Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "This is a follow up to CVE-2026-22030 to address related CSRF flows in unstable RSC code paths.\n\n\u003e [!NOTE]\n\u003e This only affects your application if you are using the unstable RSC APIs",
  "id": "GHSA-qwww-vcr4-c8h2",
  "modified": "2026-07-24T16:44:43Z",
  "published": "2026-07-24T16:44:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/security/advisories/GHSA-qwww-vcr4-c8h2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/commit/7a71c728ad116bd78699a258b2014ce9585729f5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/remix-run/react-router"
    },
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v830"
    },
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/releases/tag/react-router@8.3.0"
    },
    {
      "type": "WEB",
      "url": "http://github.com/remix-run/react-router/pull/15311"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "React Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.