CVE-2026-34745

{"id": "CVE-2026-34745", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34745", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-02T19:15:35.516472Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "ShaneIsrael", "product": "fireshare", "versions": [{"status": "affected", "version": "< 1.5.3"}]}]}], "published": "2026-04-02T19:21:33.340", "references": [{"url": "https://github.com/ShaneIsrael/fireshare/commit/b76915607924756e6fa1a5f6c8823c38d611fb24", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ShaneIsrael/fireshare/pull/520", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ShaneIsrael/fireshare/releases/tag/v1.5.3", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ShaneIsrael/fireshare/security/advisories/GHSA-fvvp-rj8g-c7gc", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "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."}, {"lang": "es", "value": "Fireshare facilita el intercambio de medios y enlaces autoalojados. Antes de la versi\u00f3n 1.5.3, la correcci\u00f3n para CVE-2026-33645 se aplic\u00f3 al endpoint autenticado /API/uploadChunked pero no se aplic\u00f3 al endpoint no autenticado /API/uploadChunked/public en el mismo archivo (app/server/fireshare/api.py). Un atacante no autenticado puede explotar el par\u00e1metro checkSum para escribir archivos arbitrarios con contenido controlado por el atacante en cualquier ruta escribible en el sistema de archivos del servidor. Este problema ha sido parcheado en la versi\u00f3n 1.5.3."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:shaneisrael:fireshare:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BD38C642-B601-465E-9D1F-CB73CFF5B954", "versionEndExcluding": "1.5.3"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}