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CVE-2026-27822

26
FAUCET Score

CVE-2026-27822 describes a Stored Cross-Site Scripting (XSS) vulnerability in the RustFS Console, affecting versions prior to 1.0.0-alpha.83. An attacker can bypass PDF preview logic to execute arbitrary JavaScript, potentially stealing administrator credentials from localStorage and leading to full account takeover and system compromise. With a CVSS score of 5.4 (MEDIUM), this vulnerability has a low attack complexity and requires user interaction, but can result in significant impact to confidentiality and integrity. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available, though it has garnered some community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.0CPE matchmatch criteria
cpe:2.3:a:rustfs:rustfs:1.0.0:alpha1:*:*:*:rust:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:rustfs:rustfs:1.0.0:alpha10:*:*:*:rust:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:rustfs:rustfs:1.0.0:alpha11:*:*:*:rust:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:rustfs:rustfs:1.0.0:alpha12:*:*:*:rust:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:rustfs:rustfs:1.0.0:alpha13:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

9.0CRITICAL

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 Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.3
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.22%
Probability of exploitation in next 30 days
EPSS Percentile
89.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0422 is in the 99th percentile among its peer group of 15,239 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

rustpatch availablevia ghsa
Product: rustfsFixed in: 1.0.0-alpha.83
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

rustGHSA-v9fg-3cr2-277jcritical

Rust has Critical Stored XSS in Preview Modal, leading to Administrative Account Takeover

Feb 25, 2026

References

github.com / rustfs/rustfs/security/advisories/GHSA-v9fg-3cr2-277j
ExploitVendor Advisory