Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-22043— RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting

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.13版本至1.0.0-alpha.78版本存在安全漏洞，该漏洞源于deny_only短路逻辑缺陷，可能导致权限提升和绕过会话策略限制。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.42% · P34
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-22043

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting
Source: CVE Program / CVE List V5
Vulnerability Description
RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, a flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent’s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions. Version 1.0.0-alpha.79 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
rustfs 安全漏洞
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.13版本至1.0.0-alpha.78版本存在安全漏洞，该漏洞源于deny_only短路逻辑缺陷，可能导致权限提升和绕过会话策略限制。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rustfs rustfs >= 1.0.0-alpha.13, < 1.0.0-alpha.79 -

II. Public POCs for CVE-2026-22043

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-22043

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-22043 (1)

IV. Related Vulnerabilities

Same product: rustfs
Same vendor: rustfs
Same weakness: CWE-269

V. Comments for CVE-2026-22043

No comments yet

Leave a comment