FKIE_CVE-2026-27607

Vulnerability from fkie_nvd - Published: 2026-02-25 03:16 - Updated: 2026-02-25 15:37
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
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.
References
security-advisories@github.comhttps://github.com/rustfs/rustfs/security/advisories/GHSA-w5fh-f8xh-5x3pVendor Advisory
Impacted products
Vendor Product Version
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
rustfs rustfs 1.0.0
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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-27607",
  "lastModified": "2026-02-25T15:37:08.497",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
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          "attackVector": "NETWORK",
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          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "NONE",
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          "privilegesRequired": "NONE",
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          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
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  "published": "2026-02-25T03:16:04.787",
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      "tags": [
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  • 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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