Vulnerability-Lookup

CVE-2026-39371 (GCVE-0-2026-39371)

Vulnerability from cvelistv5 – Published: 2026-04-07 19:28 – Updated: 2026-04-08 17:46

Title

RedwoodSDK has a CSRF vulnerability in server function dispatch via GET requests

Summary

RedwoodSDK is a server-first React framework. From 1.0.0-beta.50 to 1.0.5, erver functions exported from "use server" files could be invoked via GET requests, bypassing their intended HTTP method. In cookie-authenticated applications, this allowed cross-site GET navigations to trigger state-changing functions, because browsers send SameSite=Lax cookies on top-level GET requests. This affected all server functions -- both serverAction() handlers and bare exported functions in "use server" files. This vulnerability is fixed in 1.0.6.

Severity

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-352 - Cross-Site Request Forgery (CSRF)

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/redwoodjs/sdk/security/advisor…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
redwoodjs	sdk	Affected: >= 1.0.0-beta.50, < 1.0.6

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-39371

Vulnerability from fkie_nvd - Published: 2026-04-07 20:16 - Updated: 2026-06-17 10:42

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/redwoodjs/sdk/security/advisories/GHSA-x8rx-789c-2pxq	Vendor Advisory

Impacted products

Vendor	Product	Version
redwoodjs	redwoodsdk	*
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0
redwoodjs	redwoodsdk	1.0.0

JSON

To clipboard

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GHSA-X8RX-789C-2PXQ

Vulnerability from github – Published: 2026-04-08 00:12 – Updated: 2026-04-08 00:12

Summary

RedwoodSDK has a CSRF vulnerability in server function dispatch via GET requests

Details

Summary

Server functions exported from "use server" files could be invoked via GET requests, bypassing their intended HTTP method. In cookie-authenticated applications, this allowed cross-site GET navigations to trigger state-changing functions, because browsers send SameSite=Lax cookies on top-level GET requests.

This affected all server functions -- both serverAction() handlers and bare exported functions in "use server" files.

Impact

An attacker could construct a URL containing a known action ID and JSON-encoded arguments. When a victim with an active session visited or was redirected to this URL, the function executed with the victim's credentials. This affected any server function that performs state-changing operations (writes, deletes, mutations) in applications using cookie-based authentication.

Remediation

Update to rwsdk 1.0.6. No application code changes are required.

The fix enforces the declared HTTP method at dispatch time. GET requests to server functions that require POST now return 405 Method Not Allowed.

Severity

8.1 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Show details on source website

JSON

To clipboard

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  "affected": [
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      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.0.5"
      },
      "package": {
        "ecosystem": "npm",
        "name": "rwsdk"
      },
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          "events": [
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              "introduced": "1.0.0-beta.50"
            },
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              "fixed": "1.0.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-39371"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-352"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-08T00:12:06Z",
    "nvd_published_at": "2026-04-07T20:16:31Z",
    "severity": "HIGH"
  },
  "details": "**Summary**\n\nServer functions exported from `\"use server\"` files could be invoked via GET requests, bypassing their intended HTTP method. In cookie-authenticated applications, this allowed cross-site GET navigations to trigger state-changing functions, because browsers send `SameSite=Lax` cookies on top-level GET requests.\n\nThis affected all server functions -- both `serverAction()` handlers and bare exported functions in `\"use server\"` files.\n\n**Impact**\n\nAn attacker could construct a URL containing a known action ID and JSON-encoded arguments. When a victim with an active session visited or was redirected to this URL, the function executed with the victim\u0027s credentials. This affected any server function that performs state-changing operations (writes, deletes, mutations) in applications using cookie-based authentication.\n\n**Remediation**\n\nUpdate to rwsdk `1.0.6`. No application code changes are required.\n\nThe fix enforces the declared HTTP method at dispatch time. GET requests to server functions that require POST now return `405 Method Not Allowed`.",
  "id": "GHSA-x8rx-789c-2pxq",
  "modified": "2026-04-08T00:12:06Z",
  "published": "2026-04-08T00:12:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/redwoodjs/sdk/security/advisories/GHSA-x8rx-789c-2pxq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39371"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/redwoodjs/sdk"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RedwoodSDK has a CSRF vulnerability in server function dispatch via GET requests"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-39371 (GCVE-0-2026-39371)

FKIE_CVE-2026-39371

GHSA-X8RX-789C-2PXQ

Tags

Sightings

Nomenclature