Is CVE-2026-27607 actively exploited?

CVE-2026-27607 has no public evidence of in-the-wild exploitation as of 2026-02-25.

What is the CVSS score for CVE-2026-27607?

CVE-2026-27607 has a CVSS score of 8.1 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

How do I patch CVE-2026-27607?

Patch guidance is available from rustfs security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-27607.

Fix CVE-2026-27607 - HIGH rustfs rustfs

Q: Which products are affected by CVE-2026-27607?

27 products: rustfs rustfs, rustfs rustfs, rustfs rustfs, rustfs rustfs, rustfs rustfs, and 22 more.

Description

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.56 through 1.0.0-alpha.82, RustFS does not validate policy conditions in presigned POST uploads (PostObject), allowing attackers to bypass content-length-range, starts-with, and Content-Type constraints. This enables unauthorized file uploads exceeding size limits, uploads to arbitrary object keys, and content-type spoofing, potentially leading to storage exhaustion, unauthorized data access, and security bypasses. Version 1.0.0-alpha.83 fixes the issue.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: high
Availability: high
Weaknesses: CWE-20 · Improper Input Validation CWE-863 · Incorrect Authorization CWE-863 · Incorrect Authorization

Metadata

Primary Vendor: RUSTFS
Published: 2/25/2026
Last Modified: 2/25/2026
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 : rustfs

Remediation Guidance

Executive Summary

View on NIST NVD