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    4 vulnerabilities by @sveltejs

    CVE-2026-128123 (GCVE-0-2026-128123)

    Vulnerability from nvd – Published: 2026-11-13 19:54 – Updated: 2026-11-13 19:54
    VLAI
    Title
    SvelteKit: `@sveltejs/adapter-node` crashes when proxying certain requests via `fetch`
    Summary
    SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From version 5.5.7 until versions 5.5.8 and 6.0.1, , @sveltejs/adapter-node can attempt to add a header to an immutable request in a context that causes the server to crash, denying service to any other requests routed to that server. This issue is fixed in 5.5.8 and 6.0.1.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7868 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    sveltejs kit Affected: >= 3.0.0-next.0, < 3.1.1
    Affected: < 2.70.4
    		Create a notification for this product.
    @sveltejs adapter-node Affected: >= 5.5.7, < 5.5.8
    Affected: >= 6.0.0-next.0, < 6.0.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "kit",
          "vendor": "sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.0-next.0, \u003c 3.1.1"
            },
            {
              "status": "affected",
              "version": "\u003c 2.70.4"
            }
          ]
        },
        {
          "product": "adapter-node",
          "vendor": "@sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.5.7, \u003c 5.5.8"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0-next.0, \u003c 6.0.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From version 5.5.7 until versions 5.5.8 and 6.0.1, , @sveltejs/adapter-node can attempt to add a header to an immutable request in a context that causes the server to crash, denying service to any other requests routed to that server. This issue is fixed in 5.5.8 and 6.0.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-248",
              "description": "CWE-248: Uncaught Exception",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-13T19:54:05.381Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/sveltejs/kit/security/advisories/GHSA-rqw3-x7hx-mm3p",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-rqw3-x7hx-mm3p"
        },
        {
          "name": "https://github.com/sveltejs/kit/pull/17620",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/pull/17620"
        },
        {
          "name": "https://github.com/sveltejs/kit/commit/04756a1f7a4f73e34f1934895340a46de84fc164",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/commit/04756a1f7a4f73e34f1934895340a46de84fc164"
        },
        {
          "name": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@5.5.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@5.5.8"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@6.0.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@6.0.1"
        }
      ],
      "source": {
        "advisory": "GHSA-rqw3-x7hx-mm3p",
        "discovery": "UNKNOWN"
      },
      "title": "SvelteKit: `@sveltejs/adapter-node` crashes when proxying certain requests via `fetch`"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-128123",
    "datePublished": "2026-11-13T19:54:05.381Z",
    "dateReserved": "2026-11-12T22:42:47.031Z",
    "dateUpdated": "2026-11-13T19:54:05.381Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-128121 (GCVE-0-2026-128121)

    Vulnerability from nvd – Published: 2026-11-13 19:44 – Updated: 2026-11-13 21:22
    VLAI
    Title
    SvelteKit: Prerendered paths are interpreted as regular expressions in Vercel route config generated by @sveltejs/adapter-vercel and @sveltejs/adapter-static
    Summary
    SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to @sveltejs/adapter-vercel 6.3.5 and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1, an attacker-influenced link crawled during prerendering could be emitted into the generated Vercel routing configuration without escaping regular-expression metacharacters. The configuration could consequently interpret the path as regular-expression syntax, match unintended application paths, and expose content or behavior outside the intended path. This issue is fixed in @sveltejs/adapter-vercel 6.3.5 and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-11-13 21:22 UTC
    CWE
    • CWE-116 - Improper Encoding or Escaping of Output
    • CWE-625 - Permissive Regular Expression
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7868 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    sveltejs kit Affected: < 2.70.4
    Affected: >= 3.0.0-next.0, < 3.1.1
    		Create a notification for this product.
    @sveltejs adapter-vercel Affected: < 6.3.5
    Affected: >= 7.0.0-next.0, < 7.0.2
    		Create a notification for this product.
    @sveltejs adapter-static Affected: < 3.0.11
    Affected: >= 4.0.0-next.0, < 4.0.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-128121",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-13T21:22:41.259065Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-13T21:22:54.622Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kit",
          "vendor": "sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.70.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0-next.0, \u003c 3.1.1"
            }
          ]
        },
        {
          "product": "adapter-vercel",
          "vendor": "@sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.3.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.0.0-next.0, \u003c 7.0.2"
            }
          ]
        },
        {
          "product": "adapter-static",
          "vendor": "@sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.0.11"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0-next.0, \u003c 4.0.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to @sveltejs/adapter-vercel 6.3.5  and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1, an attacker-influenced link crawled during prerendering could be emitted into the generated Vercel routing configuration without escaping regular-expression metacharacters. The configuration could consequently interpret the path as regular-expression syntax, match unintended application paths, and expose content or behavior outside the intended path. This issue is fixed in @sveltejs/adapter-vercel 6.3.5  and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-116",
              "description": "CWE-116: Improper Encoding or Escaping of Output",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-625",
              "description": "CWE-625: Permissive Regular Expression",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-13T19:44:19.075Z",
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          "tags": [
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          ],
          "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-jf9x-2fg2-hx4w"
        },
        {
          "name": "https://github.com/sveltejs/kit/pull/17620",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/pull/17620"
        },
        {
          "name": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd"
        },
        {
          "name": "https://github.com/sveltejs/kit/commit/2ed61a6aa3ac230b89e3528654c587847d1525a0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/commit/2ed61a6aa3ac230b89e3528654c587847d1525a0"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@3.0.11",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@3.0.11"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@4.0.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@4.0.1"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@6.3.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@6.3.5"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@7.0.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@7.0.2"
        }
      ],
      "source": {
        "advisory": "GHSA-jf9x-2fg2-hx4w",
        "discovery": "UNKNOWN"
      },
      "title": "SvelteKit: Prerendered paths are interpreted as regular expressions in Vercel route config generated by @sveltejs/adapter-vercel and @sveltejs/adapter-static"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-128121",
    "datePublished": "2026-11-13T19:44:19.075Z",
    "dateReserved": "2026-11-12T22:42:47.031Z",
    "dateUpdated": "2026-11-13T21:22:54.622Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-128123 (GCVE-0-2026-128123)

    Vulnerability from cvelistv5 – Published: 2026-11-13 19:54 – Updated: 2026-11-13 19:54
    VLAI
    Title
    SvelteKit: `@sveltejs/adapter-node` crashes when proxying certain requests via `fetch`
    Summary
    SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From version 5.5.7 until versions 5.5.8 and 6.0.1, , @sveltejs/adapter-node can attempt to add a header to an immutable request in a context that causes the server to crash, denying service to any other requests routed to that server. This issue is fixed in 5.5.8 and 6.0.1.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
    CWE
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7868 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    sveltejs kit Affected: >= 3.0.0-next.0, < 3.1.1
    Affected: < 2.70.4
    		Create a notification for this product.
    @sveltejs adapter-node Affected: >= 5.5.7, < 5.5.8
    Affected: >= 6.0.0-next.0, < 6.0.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "kit",
          "vendor": "sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.0.0-next.0, \u003c 3.1.1"
            },
            {
              "status": "affected",
              "version": "\u003c 2.70.4"
            }
          ]
        },
        {
          "product": "adapter-node",
          "vendor": "@sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 5.5.7, \u003c 5.5.8"
            },
            {
              "status": "affected",
              "version": "\u003e= 6.0.0-next.0, \u003c 6.0.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From version 5.5.7 until versions 5.5.8 and 6.0.1, , @sveltejs/adapter-node can attempt to add a header to an immutable request in a context that causes the server to crash, denying service to any other requests routed to that server. This issue is fixed in 5.5.8 and 6.0.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-248",
              "description": "CWE-248: Uncaught Exception",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-13T19:54:05.381Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
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          "name": "https://github.com/sveltejs/kit/security/advisories/GHSA-rqw3-x7hx-mm3p",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-rqw3-x7hx-mm3p"
        },
        {
          "name": "https://github.com/sveltejs/kit/pull/17620",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/pull/17620"
        },
        {
          "name": "https://github.com/sveltejs/kit/commit/04756a1f7a4f73e34f1934895340a46de84fc164",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/commit/04756a1f7a4f73e34f1934895340a46de84fc164"
        },
        {
          "name": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@5.5.8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@5.5.8"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@6.0.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-node@6.0.1"
        }
      ],
      "source": {
        "advisory": "GHSA-rqw3-x7hx-mm3p",
        "discovery": "UNKNOWN"
      },
      "title": "SvelteKit: `@sveltejs/adapter-node` crashes when proxying certain requests via `fetch`"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-128123",
    "datePublished": "2026-11-13T19:54:05.381Z",
    "dateReserved": "2026-11-12T22:42:47.031Z",
    "dateUpdated": "2026-11-13T19:54:05.381Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-128121 (GCVE-0-2026-128121)

    Vulnerability from cvelistv5 – Published: 2026-11-13 19:44 – Updated: 2026-11-13 21:22
    VLAI
    Title
    SvelteKit: Prerendered paths are interpreted as regular expressions in Vercel route config generated by @sveltejs/adapter-vercel and @sveltejs/adapter-static
    Summary
    SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to @sveltejs/adapter-vercel 6.3.5 and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1, an attacker-influenced link crawled during prerendering could be emitted into the generated Vercel routing configuration without escaping regular-expression metacharacters. The configuration could consequently interpret the path as regular-expression syntax, match unintended application paths, and expose content or behavior outside the intended path. This issue is fixed in @sveltejs/adapter-vercel 6.3.5 and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1.
    Severity
    5.9 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-11-13 21:22 UTC
    CWE
    • CWE-116 - Improper Encoding or Escaping of Output
    • CWE-625 - Permissive Regular Expression
    Assigner
    GitHub_M CNA under the mitre root
    CNA scorecard C 72/100 over 7868 records in the last 180 days details
    References
    Impacted products
    Vendor Product Version
    sveltejs kit Affected: < 2.70.4
    Affected: >= 3.0.0-next.0, < 3.1.1
    		Create a notification for this product.
    @sveltejs adapter-vercel Affected: < 6.3.5
    Affected: >= 7.0.0-next.0, < 7.0.2
    		Create a notification for this product.
    @sveltejs adapter-static Affected: < 3.0.11
    Affected: >= 4.0.0-next.0, < 4.0.1
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-128121",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-13T21:22:41.259065Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-13T21:22:54.622Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kit",
          "vendor": "sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.70.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 3.0.0-next.0, \u003c 3.1.1"
            }
          ]
        },
        {
          "product": "adapter-vercel",
          "vendor": "@sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.3.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 7.0.0-next.0, \u003c 7.0.2"
            }
          ]
        },
        {
          "product": "adapter-static",
          "vendor": "@sveltejs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.0.11"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.0.0-next.0, \u003c 4.0.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to @sveltejs/adapter-vercel 6.3.5  and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1, an attacker-influenced link crawled during prerendering could be emitted into the generated Vercel routing configuration without escaping regular-expression metacharacters. The configuration could consequently interpret the path as regular-expression syntax, match unintended application paths, and expose content or behavior outside the intended path. This issue is fixed in @sveltejs/adapter-vercel 6.3.5  and 7.0.2 and @sveltejs/adapter-static 3.0.11 and 4.0.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-116",
              "description": "CWE-116: Improper Encoding or Escaping of Output",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-625",
              "description": "CWE-625: Permissive Regular Expression",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-13T19:44:19.075Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/sveltejs/kit/security/advisories/GHSA-jf9x-2fg2-hx4w",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/sveltejs/kit/security/advisories/GHSA-jf9x-2fg2-hx4w"
        },
        {
          "name": "https://github.com/sveltejs/kit/pull/17620",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/pull/17620"
        },
        {
          "name": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/sveltejs/kit/commit/0a2e58cbccdd46cac20aa5af4e2edf17e0da11dd"
        },
        {
          "name": "https://github.com/sveltejs/kit/commit/2ed61a6aa3ac230b89e3528654c587847d1525a0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/commit/2ed61a6aa3ac230b89e3528654c587847d1525a0"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@3.0.11",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@3.0.11"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@4.0.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-static@4.0.1"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@6.3.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@6.3.5"
        },
        {
          "name": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@7.0.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sveltejs/kit/releases/tag/@sveltejs/adapter-vercel@7.0.2"
        }
      ],
      "source": {
        "advisory": "GHSA-jf9x-2fg2-hx4w",
        "discovery": "UNKNOWN"
      },
      "title": "SvelteKit: Prerendered paths are interpreted as regular expressions in Vercel route config generated by @sveltejs/adapter-vercel and @sveltejs/adapter-static"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-128121",
    "datePublished": "2026-11-13T19:44:19.075Z",
    "dateReserved": "2026-11-12T22:42:47.031Z",
    "dateUpdated": "2026-11-13T21:22:54.622Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}