{"id":"CVE-2026-103398","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103398","generatedAt":"2026-10-28T02:24:48.752Z","title":"Attackers can specify arbitrary directories outside configured save locations to read and write files through manifest and sync routes.","description":"OpenSave through 2.4.0 fails to properly validate save paths supplied by paired peers in the manifest request handler. Attackers can specify arbitrary directories outside configured save locations to read and write files through manifest and sync routes.","published":"2026-09-30T15:22:29.000Z","lastModified":"2026-09-30T17:32:07.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":8.6,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-73"],"affected":[],"epss":{"score":0.00267,"percentile":0.18695,"date":"2026-10-26","history":[{"date":"2026-10-01","score":0.00478,"percentile":0.38953}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-30T15:22:29.000Z","detail":{"score":"8.6","severity":"HIGH","publishedAt":"2026-09-30T15:22:28.800Z"},"summary":"New CVE, high severity (CVSS 8.6)."}],"references":[{"url":"https://gist.github.com/mansurmavlankulov/2ca66f95965fb9d4aab353bcf2434cdb","source":"disclosure@vulncheck.com"},{"url":"https://github.com/Liquid-co/OpenSave","source":"disclosure@vulncheck.com"},{"url":"https://github.com/Liquid-co/OpenSave/blob/v2.4.0/internal/delta/rootguard.go#L16-L30","source":"disclosure@vulncheck.com"},{"url":"https://github.com/Liquid-co/OpenSave/blob/v2.4.0/internal/p2p/routes.go#L555-L566","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/opensave-through-2.4.0-arbitrary-file-read-and-write-via-peer-controlled-save-path","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103398","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}