{"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"}}]}}