Is CVE-2026-27607 actively exploited?

No active exploitation of CVE-2026-27607 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27607 be exploited remotely?

Yes. CVE-2026-27607 is exploitable remotely over the network (CVSS attack vector: Network).

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

CVE-2026-27607 has a CVSS score of 9.1 (CRITICAL) and an EPSS exploitation probability of 0.08%.

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CRITICAL

CVE-2026-27607

CWE-20Published: February 25, 2026· Updated: Feb 25, 2026

9.1

CVSS v3.1

EPSS:0.08%probability of exploitation in 30 daysPercentile:23.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-27607 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.1.