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

Vulnerability from cvelistv5 – Published: 2026-09-01 21:23 – Updated: 2026-09-01 21:23
VLAI
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
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version CPE status
vercel next.js Affected: >= 13.4.0, < 15.5.24
Affected: >= 16.0.0, < 16.3.3
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        {
          "product": "next.js",
          "vendor": "vercel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 13.4.0, \u003c 15.5.24"
            },
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              "version": "\u003e= 16.0.0, \u003c 16.3.3"
            }
          ]
        }
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          "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",
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            "version": "3.1"
          }
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      "problemTypes": [
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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          "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"
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          "url": "https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b"
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          "name": "https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3",
          "tags": [
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          ],
          "url": "https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3"
        },
        {
          "name": "https://github.com/vercel/next.js/releases/tag/v15.5.24",
          "tags": [
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          "url": "https://github.com/vercel/next.js/releases/tag/v15.5.24"
        },
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          "tags": [
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          "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"
    }
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  "cveMetadata": {
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    "cveId": "CVE-2026-75604",
    "datePublished": "2026-09-01T21:23:30.859Z",
    "dateReserved": "2026-08-17T23:49:03.450Z",
    "dateUpdated": "2026-09-01T21:23:30.859Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-75604",
      "date": "2026-09-02",
      "epss": "0.00819",
      "percentile": "0.54733"
    },
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  }
}



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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

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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.