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CVE-2026-102366

mall4j through 4.0 Unrestricted File Upload in Admin File Endpoints

CVSS 4.0 2.1 LOWCVSS 3.1 4.4 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-102366

Published

mall4j through 4.0 contains an unrestricted file upload vulnerability in FileController endpoints that lack authorization checks and accept arbitrary file types without validation. Attackers with any authenticated token can upload HTML or SVG files that execute scripts in administrator browsers when accessed from the local storage path, resulting in stored cross-site scripting.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-102366

Published

mall4j

https://github.com/gz-yami/mall4j

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "gz-yami",
                    "product": "mall4j",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "4.0",
                            "status": "affected",
                            "versionType": "custom"
                        }
                    ],
                    "collectionURL": "https://github.com/gz-yami/mall4j",
                    "repo": "https://github.com/gz-yami/mall4j"
                }

Original source record · Cite this exact observation · Complete original publisher JSON