CVE-2026-27607 (GCVE-0-2026-27607)

Vulnerability from cvelistv5 – Published: 2026-02-25 02:10 – Updated: 2026-02-25 20:06
VLAI?
Title
RustFS's Missing Post Policy Validation leads to Arbitrary Object Write
Summary
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.
Severity ?
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-20 - Improper Input Validation
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
rustfs rustfs Affected: >= 1.0.0-alpha.56, < 1.0.0-alpha.83
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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