Is CVE-2026-22043 actively exploited?

CVE-2026-22043 has no public evidence of in-the-wild exploitation as of 2026-01-15.

What is the CVSS score for CVE-2026-22043?

CVE-2026-22043 has a CVSS score of 5.7 (MEDIUM severity). Vector: 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2026-22043?

Patch guidance is available from rustfs security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-22043.

CVE-2026-22043 - remediation guidance & executive summary

Q: Which products are affected by CVE-2026-22043?

66 products: rustfs rustfs, rustfs rustfs, rustfs rustfs, rustfs rustfs, rustfs rustfs, and 61 more.

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.

CVSS Metrics

Vector: 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-269 · Improper Privilege Management CWE-284 CWE-522 · Insufficiently Protected Credentials

Metadata

Primary Vendor: RUSTFS
Published: 1/8/2026
Last Modified: 1/15/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

rustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfsrustfs : rustfs

Remediation Guidance

Executive Summary

View on NIST NVD