Medium severity5.4NVD Advisory· Published Oct 13, 2026
CVE-2026-110101
CVE-2026-110101
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.
Affected products
1- Range: <=1.8.4
Patches
Vulnerability mechanics
References
5- github.com/benjaminjonard/koillection/blob/1.8.4/src/Entity/Datum.phpnvd
- github.com/benjaminjonard/koillection/blob/1.8.4/src/Service/ImageHandler.phpnvd
- github.com/benjaminjonard/koillection/issues/1609nvd
- github.com/benjaminjonard/koillection/releases/tag/1.8.4nvd
- www.vulncheck.com/advisories/koillection-through-1.8.4-stored-xss-via-datum-file-attachment-uploadsnvd
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