{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-34745",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-03-30T19:17:10.224Z",
        "datePublished": "2026-04-02T18:38:17.626Z",
        "dateUpdated": "2026-04-02T19:15:43.377Z"
    },
    "containers": {
        "cna": {
            "title": "Unauthenticated Path Traversal Arbitrary File Write in /api/uploadChunked/public",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-22",
                            "lang": "en",
                            "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 9.1,
                        "baseSeverity": "CRITICAL",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-fvvp-rj8g-c7gc",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-fvvp-rj8g-c7gc"
                },
                {
                    "name": "https://github.com/ShaneIsrael/fireshare/pull/520",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/ShaneIsrael/fireshare/pull/520"
                },
                {
                    "name": "https://github.com/ShaneIsrael/fireshare/commit/b76915607924756e6fa1a5f6c8823c38d611fb24",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/ShaneIsrael/fireshare/commit/b76915607924756e6fa1a5f6c8823c38d611fb24"
                },
                {
                    "name": "https://github.com/ShaneIsrael/fireshare/releases/tag/v1.5.3",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/ShaneIsrael/fireshare/releases/tag/v1.5.3"
                }
            ],
            "affected": [
                {
                    "vendor": "ShaneIsrael",
                    "product": "fireshare",
                    "versions": [
                        {
                            "version": "< 1.5.3",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-04-02T18:38:17.626Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Fireshare facilitates self-hosted media and link sharing. Prior to version 1.5.3, the fix for CVE-2026-33645 was applied to the authenticated /api/uploadChunked endpoint but was not applied to the unauthenticated /api/uploadChunked/public endpoint in the same file (app/server/fireshare/api.py). An unauthenticated attacker can exploit the checkSum parameter to write arbitrary files with attacker-controlled content to any writable path on the server filesystem. This issue has been patched in version 1.5.3."
                }
            ],
            "source": {
                "advisory": "GHSA-fvvp-rj8g-c7gc",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-04-02T19:15:35.516472Z",
                                "id": "CVE-2026-34745",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "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": "2026-04-02T19:15:43.377Z"
                }
            }
        ]
    }
}