{"id":"CVE-2026-49453","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-49453","generatedAt":"2026-10-28T00:20:32.295Z","title":"BaseItem.unserialize() stores the unvalidated fields, resourceFilename() concatenates them into a destination path, and ResourceFetcher writes the attacker-controlled resource blob outside the resource directory during background synchronization.","description":"Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, Joplin accepts synchronized resource metadata whose id or file_extension contains parent-directory or path-separator characters. BaseItem.unserialize() stores the unvalidated fields, resourceFilename() concatenates them into a destination path, and ResourceFetcher writes the attacker-controlled resource blob outside the resource directory during background synchronization. An attacker with write access to a configured sync target or shared notebook can create or overwrite files at an attacker-chosen existing path without user interaction. This issue is fixed in versions 3.6.15 and 3.7.2.","published":"2026-09-21T21:17:04.000Z","lastModified":"2026-09-23T18:30:43.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L"},"cwe":["CWE-20","CWE-22"],"affected":[],"epss":{"score":0.0041,"percentile":0.35008,"date":"2026-10-26","history":[{"date":"2026-09-22","score":0.00288,"percentile":0.21612}]},"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 (0.41%). 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":"2026-09-21T21:17:04.000Z","detail":{"score":"7.0","severity":"HIGH","publishedAt":"2026-09-21T21:17:03.900Z"},"summary":"New CVE, high severity (CVSS 7.0)."}],"references":[{"url":"https://github.com/laurent22/joplin/commit/18e0b08c282c89ae51612c4eff67af2a45ff5163","source":"security-advisories@github.com"},{"url":"https://github.com/laurent22/joplin/commit/50518073740c4501058e366300b42c2f1925cb05","source":"security-advisories@github.com"},{"url":"https://github.com/laurent22/joplin/pull/15540","source":"security-advisories@github.com"},{"url":"https://github.com/laurent22/joplin/pull/15672","source":"security-advisories@github.com"},{"url":"https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgf","source":"security-advisories@github.com"},{"url":"https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgf","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-49453","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."}