{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-63475",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-16T21:37:45.769Z",
        "datePublished": "2026-11-03T19:45:24.488Z",
        "dateUpdated": "2026-11-03T21:31:07.998Z"
    },
    "containers": {
        "cna": {
            "title": "isomorphic-git: Circular symbolic references cause non-terminating resolution (DoS)",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-674",
                            "lang": "en",
                            "description": "CWE-674: Uncontrolled Recursion",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-835",
                            "lang": "en",
                            "description": "CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "LOW",
                        "baseScore": 4.3,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7"
                },
                {
                    "name": "https://github.com/isomorphic-git/isomorphic-git/pull/2370",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/isomorphic-git/isomorphic-git/pull/2370"
                },
                {
                    "name": "https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/isomorphic-git/isomorphic-git/commit/823843d1cd19182df79bc907c767f5bcecb39a0b"
                },
                {
                    "name": "https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/isomorphic-git/isomorphic-git/releases/tag/v1.38.6"
                }
            ],
            "affected": [
                {
                    "vendor": "isomorphic-git",
                    "product": "isomorphic-git",
                    "versions": [
                        {
                            "version": "< 1.38.6",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-11-03T19:45:24.488Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "isomorphic-git is a pure JavaScript implementation of Git for Node.js and browsers. Prior to 1.38.6, isomorphic-git persists server-supplied circular symref= capabilities through updateRemoteRefs, and GitRefManager.resolve() follows the resulting loose symbolic references without a default depth limit or cycle detection. After a clone from a malicious or man-in-the-middle-controlled remote, operations such as log, status, checkout, and branch that resolve refs/remotes/origin/a or refs/remotes/origin/b do not terminate. The circular references remain on disk, leaving the repository unusable for the application and causing a persistent denial of service. This issue is fixed in version 1.38.6."
                }
            ],
            "source": {
                "advisory": "GHSA-96wc-2m84-2cj7",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/isomorphic-git/isomorphic-git/security/advisories/GHSA-96wc-2m84-2cj7",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-11-03T21:30:35.793171Z",
                                "id": "CVE-2026-63475",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-11-03T21:31:07.998Z"
                }
            }
        ]
    }
}