{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.0.0-beta.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5a5f4a48ba18c004d4552cbee15d0e3e1f8ea371"
            }
          ],
          "repo": "https://github.com/wakujs/waku",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-75w3-gmqx-993q"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-352"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49455.json"
  },
  "details": "Waku is the minimal React framework. Prior to version 1.0.0-beta.1, Waku's RSC request dispatcher invokes server actions without validating the request's Origin (or Sec-Fetch-Site) header. A cross-origin web attacker can therefore cause a victim browser to issue an authenticated POST to a registered server action endpoint using a CORS-safelisted content type (text/plain), which does not trigger a preflight. Any state-mutating server action that the application exposes via 'use server' can be invoked with the victim's cookies attached. This issue has been patched in version 1.0.0-beta.1.",
  "id": "CVE-2026-49455",
  "modified": "2026-09-05T03:30:33.421595278Z",
  "published": "2026-09-03T18:15:42.014Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/wakujs/waku/releases/tag/v1.0.0-beta.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49455.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/wakujs/waku/security/advisories/GHSA-75w3-gmqx-993q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49455"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Waku: Cross-Origin CSRF on RSC Server Action Dispatch"
}