{"id":"CVE-2026-110101","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-110101","generatedAt":"2026-10-28T00:59:38.817Z","title":"Koillection through 1.8.4 contains a stored cross-site scripting vulnerability that allows authenticated users to upload HTML files as Datum file attachments lacking MIME restrictions.","description":"Koillection through 1.8.4 contains a stored cross-site scripting vulnerability that allows authenticated users to upload HTML files as Datum file attachments lacking MIME restrictions. Attackers can upload HTML payloads via POST /api/data/{id}/file, served as text/html from public/uploads, executing JavaScript in victims' sessions to perform actions on their behalf.","published":"2026-10-13T17:17:34.000Z","lastModified":"2026-10-16T23:16:59.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":5.1,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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-79"],"affected":[],"epss":{"score":0.00264,"percentile":0.18126,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.00215,"percentile":0.11084}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-13T17:17:34.000Z","detail":{"score":"5.1","severity":"MEDIUM","publishedAt":"2026-10-13T17:17:33.830Z"},"summary":"New CVE, medium severity (CVSS 5.1)."}],"references":[{"url":"https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Entity/Datum.php#L141-L145","source":"disclosure@vulncheck.com"},{"url":"https://github.com/benjaminjonard/koillection/blob/1.8.4/src/Service/ImageHandler.php#L43-L50","source":"disclosure@vulncheck.com"},{"url":"https://github.com/benjaminjonard/koillection/issues/1609","source":"disclosure@vulncheck.com"},{"url":"https://github.com/benjaminjonard/koillection/releases/tag/1.8.4","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/koillection-through-1.8.4-stored-xss-via-datum-file-attachment-uploads","source":"disclosure@vulncheck.com"},{"url":"https://github.com/benjaminjonard/koillection/issues/1609","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-110101","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."}