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Vulnerability record · CVE-2026-55477 · published 25 June 2026

CVE-2026-55477: 3X-UI is a web control panel for managing Xray-core servers.

3X-UI is a web control panel for managing Xray-core servers. Prior to 3.3.1, an authenticated administrator can abuse the database import functionality to achieve arbitrary file write on the host by modifying Xray configuration values stored in the database. This can be leveraged to obtain code execution and persistent access as the user running Xray (including root when Xray is running as root). This vulnerability is fixed in 3.3.1.

7.2 CVSS 3.1 High EPSS 0.62% · top 52.6% CWE-73 · CWE-73 Deferred
7.2CVSS 3.1 base score
0.62%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
25 Jun 2026Last modified by NVD

Description

3X-UI is a web control panel for managing Xray-core servers. Prior to 3.3.1, an authenticated administrator can abuse the database import functionality to achieve arbitrary file write on the host by modifying Xray configuration values stored in the database. This can be leveraged to obtain code execution and persistent access as the user running Xray (including root when Xray is running as root). This vulnerability is fixed in 3.3.1.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/MHSanaei/3x-ui/security/advisories/GHSA-jm48-m3rr-9hgg
https://github.com/MHSanaei/3x-ui/security/advisories/GHSA-jm48-m3rr-9hgg

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Source: NIST National Vulnerability Database (record CVE-2026-55477), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.