Vulnerability-Lookup

GHSA-R2FC-CCR8-96C4

Vulnerability from github – Published: 2025-07-03 20:30 – Updated: 2025-07-03 21:49

Summary

Next.js has a Cache poisoning vulnerability due to omission of the Vary header

Details

Summary

A cache poisoning issue in Next.js App Router >=15.3.0 and < 15.3.3 may have allowed RSC payloads to be cached and served in place of HTML, under specific conditions involving middleware and redirects. This issue has been fixed in Next.js 15.3.3.

Users on affected versions should upgrade immediately and redeploy to ensure proper caching behavior.

More details: CVE-2025-49005

Severity

3.7 (Low)


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

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "next"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "15.3.0"
            },
            {
              "fixed": "15.3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-49005"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-444"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-07-03T20:30:18Z",
    "nvd_published_at": "2025-07-03T21:15:26Z",
    "severity": "LOW"
  },
  "details": "### Summary\n\nA cache poisoning issue in **Next.js App Router \u003e=15.3.0 and \u003c 15.3.3** may have allowed RSC payloads to be cached and served in place of HTML, under specific conditions involving middleware and redirects. This issue has been fixed in **Next.js 15.3.3**.\n\nUsers on affected versions should **upgrade immediately** and **redeploy** to ensure proper caching behavior.\n\nMore details: [CVE-2025-49005](https://vercel.com/changelog/cve-2025-49005)",
  "id": "GHSA-r2fc-ccr8-96c4",
  "modified": "2025-07-03T21:49:00Z",
  "published": "2025-07-03T20:30:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-49005"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/issues/79346"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/pull/79939"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vercel/next.js"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vercel/next.js/releases/tag/v15.3.3"
    },
    {
      "type": "WEB",
      "url": "https://vercel.com/changelog/cve-2025-49005"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Next.js has a Cache poisoning vulnerability due to omission of the Vary header"
}

CVE-2025-49005 (GCVE-0-2025-49005)

Vulnerability from cvelistv5 – Published: 2025-07-03 21:01 – Updated: 2025-07-08 14:34

Title

Next.js cache poisoning due to omission of Vary header

Summary

Next.js is a React framework for building full-stack web applications. In Next.js App Router from 15.3.0 to before 15.3.3 and Vercel CLI from 41.4.1 to 42.2.0, a cache poisoning vulnerability was found. The issue allowed page requests for HTML content to return a React Server Component (RSC) payload instead under certain conditions. When deployed to Vercel, this would only impact the browser cache, and would not lead to the CDN being poisoned. When self-hosted and deployed externally, this could lead to cache poisoning if the CDN does not properly distinguish between RSC / HTML in the cache keys. This issue has been resolved in Next.js 15.3.3.

Severity

3.7 (Low)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-08 14:34 UTC

CWE

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7926 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/vercel/next.js/security/adviso…	x_refsource_CONFIRM
https://github.com/vercel/next.js/issues/79346	x_refsource_MISC
https://github.com/vercel/next.js/commit/ec202ecc…	x_refsource_MISC
https://github.com/vercel/next.js/releases/tag/v15.3.3	x_refsource_MISC
https://vercel.com/changelog/cve-2025-49005	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
vercel	next.js	Affected: >= 15.3.0, < 15.3.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-49005",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-08T14:34:09.669602Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-08T14:34:12.642Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/vercel/next.js/issues/79346"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "next.js",
          "vendor": "vercel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 15.3.0, \u003c 15.3.3"
            }
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        }
      ],
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        {
          "lang": "en",
          "value": "Next.js is a React framework for building full-stack web applications. In Next.js App Router from 15.3.0 to before 15.3.3 and Vercel CLI from 41.4.1 to 42.2.0, a cache poisoning vulnerability was found. The issue allowed page requests for HTML content to return a React Server Component (RSC) payload instead under certain conditions. When deployed to Vercel, this would only impact the browser cache, and would not lead to the CDN being poisoned. When self-hosted and deployed externally, this could lead to cache poisoning if the CDN does not properly distinguish between RSC / HTML in the cache keys. This issue has been resolved in Next.js 15.3.3."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
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              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
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              "type": "CWE"
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          ]
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      "providerMetadata": {
        "dateUpdated": "2025-07-03T21:01:14.743Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
        {
          "name": "https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4",
          "tags": [
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          "url": "https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4"
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          "tags": [
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        {
          "name": "https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066",
          "tags": [
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          ],
          "url": "https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066"
        },
        {
          "name": "https://github.com/vercel/next.js/releases/tag/v15.3.3",
          "tags": [
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          "url": "https://github.com/vercel/next.js/releases/tag/v15.3.3"
        },
        {
          "name": "https://vercel.com/changelog/cve-2025-49005",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://vercel.com/changelog/cve-2025-49005"
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      ],
      "source": {
        "advisory": "GHSA-r2fc-ccr8-96c4",
        "discovery": "UNKNOWN"
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      "title": "Next.js cache poisoning due to omission of Vary header"
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  },
  "cveMetadata": {
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    "datePublished": "2025-07-03T21:01:14.743Z",
    "dateReserved": "2025-05-29T16:34:07.175Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

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GHSA-R2FC-CCR8-96C4

Summary

CVE-2025-49005 (GCVE-0-2025-49005)

Tags

Sightings

Nomenclature

Vulnerability timeline

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