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CVE-2026-27822— Rust has Critical Stored XSS in Preview Modal, leading to Administrative Account Takeover

Quick assessment

Affected
rustfs rustfs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

rustfs是RustFS开源的一个高性能对象存储系统。 RustFS 1.0.0-alpha.83之前版本存在跨站脚本漏洞，该漏洞源于存储型跨站脚本，可能导致凭据泄露和账户接管。

CVSS 9.1 · Critical EPSS 0.37% · P29
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I. Basic Information for CVE-2026-27822

Vulnerability Information
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Vulnerability Title
Rust has Critical Stored XSS in Preview Modal, leading to Administrative Account Takeover
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
rustfs 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
rustfs是RustFS开源的一个高性能对象存储系统。 RustFS 1.0.0-alpha.83之前版本存在跨站脚本漏洞，该漏洞源于存储型跨站脚本，可能导致凭据泄露和账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
rustfs rustfs < 1.0.0-alpha.83 -

II. Public POCs for CVE-2026-27822

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III. Intelligence Information for CVE-2026-27822

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Vendor Advisories for CVE-2026-27822 (1)

IV. Related Vulnerabilities

Same product: rustfs
Same vendor: rustfs
Same weakness: CWE-79

V. Comments for CVE-2026-27822

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