github - ghsa-mh55-gqvf-xfwm

ghsa-mh55-gqvf-xfwm

Vulnerability from github

Published

2024-07-05 19:42

Modified

2025-08-06 22:10

Summary

Denial of service via malicious preflight requests in github.com/rs/cors

Details

Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/rs/cors"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.9.0"
            },
            {
              "fixed": "1.11.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-47908"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-07-05T19:42:48Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.",
  "id": "GHSA-mh55-gqvf-xfwm",
  "modified": "2025-08-06T22:10:52Z",
  "published": "2024-07-05T19:42:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-47908"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rs/cors/issues/170"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rs/cors/pull/171"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rs/cors/commit/4c32059b2756926619f6bf70281b91be7b5dddb2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rs/cors"
    },
    {
      "type": "WEB",
      "url": "https://pkg.go.dev/vuln/GO-2024-2883"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Denial of service via malicious preflight requests in github.com/rs/cors"
}

CVE-2025-47908 (GCVE-0-2025-47908)

Vulnerability from cvelistv5

Published

2025-08-06 20:41

Modified

2025-08-07 13:47

Severity ?

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

CWE

CWE-1325: Improperly Controlled Sequential Memory Allocation

Summary

Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.

References

URL

Tags

	https://github.com/rs/cors/pull/171
	https://github.com/rs/cors/issues/170
	https://pkg.go.dev/vuln/GO-2024-2883

Impacted products

	Vendor	Product	Version
	github.com/rs/cors	github.com/rs/cors	Version: 1.9.0 ≤

Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-47908",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-07T13:46:29.844868Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-07T13:47:15.232Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "github.com/rs/cors",
          "product": "github.com/rs/cors",
          "programRoutines": [
            {
              "name": "Cors.handlePreflight"
            },
            {
              "name": "Cors.areHeadersAllowed"
            },
            {
              "name": "New"
            },
            {
              "name": "splitHeaderValues"
            },
            {
              "name": "AllowAll"
            },
            {
              "name": "Cors.HandlerFunc"
            },
            {
              "name": "Cors.ServeHTTP"
            },
            {
              "name": "Default"
            }
          ],
          "vendor": "github.com/rs/cors",
          "versions": [
            {
              "lessThan": "1.11.0",
              "status": "affected",
              "version": "1.9.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "@jub0bs"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-1325: Improperly Controlled Sequential Memory Allocation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-06T20:41:31.311Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://github.com/rs/cors/pull/171"
        },
        {
          "url": "https://github.com/rs/cors/issues/170"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2024-2883"
        }
      ],
      "title": "Denial of service via malicious preflight requests in github.com/rs/cors"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2025-47908",
    "datePublished": "2025-08-06T20:41:31.311Z",
    "dateReserved": "2025-05-13T23:31:29.597Z",
    "dateUpdated": "2025-08-07T13:47:15.232Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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