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

To clipboard

{
  "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

To clipboard

{
  "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"
}

Log in or create an account to share your comment.

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.