{"id":"CVE-2026-103937","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103937","generatedAt":"2026-10-28T01:12:32.985Z","title":"From 13.0.0 until 2025.4.1 and from 2025.5.0 until 2026.7.0, cleanup processing may not execute during file uploads.","description":"Misskey is an open source, federated social media platform. From 13.0.0 until 2025.4.1 and from 2025.5.0 until 2026.7.0, cleanup processing may not execute during file uploads. Repeated uploads can exhaust storage or file descriptors and deny service regardless of whether federation is enabled. This issue is fixed in version 2026.7.0.","published":"2026-10-13T19:17:54.000Z","lastModified":"2026-10-16T20:04:30.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":8.7,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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-459"],"affected":[],"epss":{"score":0.00501,"percentile":0.42652,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.00501,"percentile":0.41432}]},"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 (0.50%). 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":"2026-10-13T19:17:54.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-10-13T19:17:54.387Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://github.com/misskey-dev/misskey/commit/3f28489fb856e6e07a16290f3ea1e1261572b527","source":"security-advisories@github.com"},{"url":"https://github.com/misskey-dev/misskey/pull/17750","source":"security-advisories@github.com"},{"url":"https://github.com/misskey-dev/misskey/releases/tag/2026.7.0","source":"security-advisories@github.com"},{"url":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-m9xp-2fvm-pfmq","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103937","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."}