CVE-2026-27822 — CRITICAL (9.0)

Vulnerability Description

RustFS is a distributed object storage system built in Rust. Prior to version 1.0.0-alpha.83, a Stored Cross-Site Scripting (XSS) vulnerability in the RustFS Console allows an attacker to execute arbitrary JavaScript in the context of the management console. By bypassing the PDF preview logic, an attacker can steal administrator credentials from `localStorage`, leading to full account takeover and system compromise. Version 1.0.0-alpha.83 fixes the issue.

CVSS Score

9.0

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Rustfs	Rustfs	1.0.0

Related Weaknesses (CWE)

CWE-79

References

https://github.com/rustfs/rustfs/security/advisories/GHSA-v9fg-3cr2-277jExploitVendor Advisory

FAQ

What is CVE-2026-27822?

CVE-2026-27822 is a vulnerability with a CVSS score of 9.0 (CRITICAL). RustFS is a distributed object storage system built in Rust. Prior to version 1.0.0-alpha.83, a Stored Cross-Site Scripting (XSS) vulnerability in the RustFS Console allows an attacker to execute arbi...

How severe is CVE-2026-27822?

CVE-2026-27822 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-27822?

Check the references section above for vendor advisories and patch information. Affected products include: Rustfs Rustfs.