Vulnerability-Lookup

GHSA-8HMM-4CRW-VM2C

Vulnerability from github – Published: 2025-08-21 14:54 – Updated: 2025-08-21 19:17

Summary

@musistudio/claude-code-router has improper CORS configuration

Details

Impact

Due to improper Cross-Origin Resource Sharing (CORS) configuration, there is a risk that user API Keys or equivalent credentials may be exposed to untrusted domains. Attackers could exploit this misconfiguration to steal credentials, abuse accounts, exhaust quotas, or access sensitive data.

Patches

The issue has been patched in v1.0.34.

Severity

0.0 (None)


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

8.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@musistudio/claude-code-router"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.34"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-57755"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-942"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-21T14:54:24Z",
    "nvd_published_at": "2025-08-21T17:15:31Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nDue to improper Cross-Origin Resource Sharing (CORS) configuration, there is a risk that user API Keys or equivalent credentials may be exposed to untrusted domains. Attackers could exploit this misconfiguration to steal credentials, abuse accounts, exhaust quotas, or access sensitive data.\n\n### Patches\nThe issue has been patched in v1.0.34.",
  "id": "GHSA-8hmm-4crw-vm2c",
  "modified": "2025-08-21T19:17:34Z",
  "published": "2025-08-21T14:54:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/musistudio/claude-code-router/security/advisories/GHSA-8hmm-4crw-vm2c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-57755"
    },
    {
      "type": "WEB",
      "url": "https://github.com/musistudio/claude-code-router/issues/549"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/musistudio/claude-code-router"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "@musistudio/claude-code-router has improper CORS configuration"
}

BREW-CLAUDE-CODE-ROUTER-… (GHSA-8HMM-4CRW-VM2C)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:40 – Updated: 2026-09-11 15:30 – Source website

Summary

@musistudio/claude-code-router has improper CORS configuration

Details

Impact

Patches

The issue has been patched in v1.0.34.

Severity

0.0 (None)


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

8.1 (High)


                    
                      CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

References

URL

Type

	https://github.com/musistudio/claude-code-router/…	WEB
	https://nvd.nist.gov/vuln/detail/CVE-2025-57755	ADVISORY
	https://github.com/musistudio/claude-code-router/…	WEB
	https://github.com/musistudio/claude-code-router	PACKAGE

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "1.0.34"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "claude-code-router",
        "purl": "pkg:brew/claude-code-router"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "npm",
        "key": "pkg:npm/%40musistudio/claude-code-router@3.1.0",
        "name": "@musistudio/claude-code-router",
        "strategy": "registry",
        "subject_version": "3.1.0"
      }
    ]
  },
  "details": "### Impact\nDue to improper Cross-Origin Resource Sharing (CORS) configuration, there is a risk that user API Keys or equivalent credentials may be exposed to untrusted domains. Attackers could exploit this misconfiguration to steal credentials, abuse accounts, exhaust quotas, or access sensitive data.\n\n### Patches\nThe issue has been patched in v1.0.34.",
  "id": "BREW-claude-code-router-CVE-2025-57755",
  "modified": "2026-09-11T15:30:50Z",
  "published": "2026-08-13T16:40:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/musistudio/claude-code-router/security/advisories/GHSA-8hmm-4crw-vm2c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-57755"
    },
    {
      "type": "WEB",
      "url": "https://github.com/musistudio/claude-code-router/issues/549"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/musistudio/claude-code-router"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
      "type": "CVSS_V4"
    }
  ],
  "summary": "@musistudio/claude-code-router has improper CORS configuration",
  "upstream": [
    "GHSA-8hmm-4crw-vm2c",
    "CVE-2025-57755"
  ]
}

CVE-2025-57755 (GCVE-0-2025-57755)

Vulnerability from cvelistv5 – Published: 2025-08-21 16:21 – Updated: 2025-08-21 17:31

Title

claude-code-router CORS. misconfiguration

Summary

claude-code-router is a powerful tool to route Claude Code requests to different models and customize any request. Due to improper Cross-Origin Resource Sharing (CORS) configuration, there is a risk that user API Keys or equivalent credentials may be exposed to untrusted domains. Attackers could exploit this misconfiguration to steal credentials, abuse accounts, exhaust quotas, or access sensitive data. The issue has been patched in v1.0.34.

Severity

8.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-21 17:23 UTC

CWE

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-942 - Permissive Cross-domain Policy with Untrusted Domains

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7771 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/musistudio/claude-code-router/…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
musistudio	claude-code-router	Affected: < 1.0.34

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-57755",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-21T17:23:11.558909Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-08-21T17:31:44.119Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "claude-code-router",
          "vendor": "musistudio",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.0.34"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "claude-code-router is a powerful tool to route Claude Code requests to different models and customize any request. Due to improper Cross-Origin Resource Sharing (CORS) configuration, there is a risk that user API Keys or equivalent credentials may be exposed to untrusted domains. Attackers could exploit this misconfiguration to steal credentials, abuse accounts, exhaust quotas, or access sensitive data. The issue has been patched in v1.0.34."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-942",
              "description": "CWE-942: Permissive Cross-domain Policy with Untrusted Domains",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-21T16:21:33.485Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/musistudio/claude-code-router/security/advisories/GHSA-8hmm-4crw-vm2c",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/musistudio/claude-code-router/security/advisories/GHSA-8hmm-4crw-vm2c"
        }
      ],
      "source": {
        "advisory": "GHSA-8hmm-4crw-vm2c",
        "discovery": "UNKNOWN"
      },
      "title": "claude-code-router CORS. misconfiguration"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-57755",
    "datePublished": "2025-08-21T16:21:33.485Z",
    "dateReserved": "2025-08-19T15:16:22.916Z",
    "dateUpdated": "2025-08-21T17:31:44.119Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-8HMM-4CRW-VM2C

Impact

Patches

BREW-CLAUDE-CODE-ROUTER-… (GHSA-8HMM-4CRW-VM2C)

Impact

Patches

CVE-2025-57755 (GCVE-0-2025-57755)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour