Vulnerability-Lookup

GHSA-P293-QW3H-JR36

Vulnerability from github – Published: 2026-09-08 20:51 – Updated: 2026-09-08 20:51

Summary

Next.js: Unauthenticated Remote Code Execution on windows-hosted servers

Details

Impact

A vulnerability in applications using Pages and App router without Cache Component can lead to remote code execution when the server is hosted on machines using a Windows filesystem.

Workaround

There is no known workaround for affected windows-hosted applications. You should upgrade immediately if your server is hosted on Windows.

Severity

9.0 (Critical)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "13.4.0"
            },
            {
              "fixed": "15.5.24"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "16.0.0"
            },
            {
              "fixed": "16.3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-75604"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-08T20:51:40Z",
    "nvd_published_at": "2026-09-01T22:17:12Z",
    "severity": "CRITICAL"
  },
  "details": "## Impact\n\nA vulnerability in applications using Pages and App router without Cache Component can lead to remote code execution when the server is hosted on machines using a Windows filesystem.\n\n## Workaround\n\nThere is no known workaround for affected windows-hosted applications. You should upgrade immediately if your server is hosted on Windows.",
  "id": "GHSA-p293-qw3h-jr36",
  "modified": "2026-09-08T20:51:40Z",
  "published": "2026-09-08T20:51:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75604"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vercel/next.js"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/releases/tag/v15.5.24"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/releases/tag/v16.3.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Next.js: Unauthenticated Remote Code Execution on windows-hosted servers"
}

CVE-2026-75604 (GCVE-0-2026-75604)

Vulnerability from cvelistv5 – Published: 2026-09-01 21:23 – Updated: 2026-09-04 19:54

Title

Next.js: Unauthenticated Remote Code Execution on windows-hosted servers

Summary

Next.js is a React framework for building full-stack web applications. From 13.4.0 until 15.5.24 and 16.3.3, Next.js applications using Pages Router or App Router without Cache Components on Windows-hosted servers do not consistently escape backslashes in route segments before constructing incremental-cache paths. In packages/next/src/shared/lib/router/utils/escape-path-delimiters.ts and packages/next/src/server/lib/incremental-cache/file-system-cache.ts, a remote request can supply encoded Windows path separators that traverse outside the intended cache root and expose private build data, including the server-reference-manifest encryption key. Disclosure of that key can enable remote code execution in the affected application. This issue is fixed in versions 15.5.24 and 16.3.3.

Severity

9 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 03:56 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/vercel/next.js/security/adviso…	x_refsource_CONFIRM
https://github.com/vercel/next.js/commit/968b9fcb…	x_refsource_MISC
https://github.com/vercel/next.js/commit/b0f3460a…	x_refsource_MISC
https://github.com/vercel/next.js/releases/tag/v15.5.24	x_refsource_MISC
https://github.com/vercel/next.js/releases/tag/v16.3.3	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
vercel	next.js	Affected: >= 13.4.0, < 15.5.24 Affected: >= 16.0.0, < 16.3.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75604",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-03T03:56:24.826443Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-04T19:54:40.089Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "next.js",
          "vendor": "vercel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 13.4.0, \u003c 15.5.24"
            },
            {
              "status": "affected",
              "version": "\u003e= 16.0.0, \u003c 16.3.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Next.js is a React framework for building full-stack web applications. From 13.4.0 until 15.5.24 and 16.3.3, Next.js applications using Pages Router or App Router without Cache Components on Windows-hosted servers do not consistently escape backslashes in route segments before constructing incremental-cache paths. In packages/next/src/shared/lib/router/utils/escape-path-delimiters.ts and packages/next/src/server/lib/incremental-cache/file-system-cache.ts, a remote request can supply encoded Windows path separators that traverse outside the intended cache root and expose private build data, including the server-reference-manifest encryption key. Disclosure of that key can enable remote code execution in the affected application. This issue is fixed in versions 15.5.24 and 16.3.3."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-01T21:23:30.859Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36"
        },
        {
          "name": "https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b"
        },
        {
          "name": "https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3"
        },
        {
          "name": "https://github.com/vercel/next.js/releases/tag/v15.5.24",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vercel/next.js/releases/tag/v15.5.24"
        },
        {
          "name": "https://github.com/vercel/next.js/releases/tag/v16.3.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vercel/next.js/releases/tag/v16.3.3"
        }
      ],
      "source": {
        "advisory": "GHSA-p293-qw3h-jr36",
        "discovery": "UNKNOWN"
      },
      "title": "Next.js: Unauthenticated Remote Code Execution on windows-hosted servers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-75604",
    "datePublished": "2026-09-01T21:23:30.859Z",
    "dateReserved": "2026-08-17T23:49:03.450Z",
    "dateUpdated": "2026-09-04T19:54:40.089Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.