CVE-2026-39360Disclosure(rustfs / rustfs)

LOWCVSS 4.3 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch rustfs rustfs systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

RustFS is a distributed object storage system built in Rust. Prior to alpha.90, RustFS contains a missing authorization check in the multipart copy path (UploadPartCopy). A low-privileged user who cannot read objects from a victim bucket can still exfiltrate victim objects by copying them into an attacker-controlled multipart upload and completing the upload. This breaks tenant isolation in multi-user / multi-tenant deployments. This vulnerability is fixed in alpha.90.

rustfs CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Exploit / PoC references

https://github.com/rustfs/rustfs/security/advisories/GHSA-mx42-j6wv-px98

Weakness type (CWE)

CWE-862

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

rustfs

Threat summary

Patch or workaround signal is available
2 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 2 signals
Disclosure: 1 classified signal
Peaked 1d ago at 1 mentions (2026-04-07); latest day: 1
2 total mentions across 2 days

Affected systems

Vendors

rustfs

Products

rustfs

1 version affected across 1 product

Deep dive

Activity timeline2 mentions / 2d

Signal classification2 categories

Disclosure

150.0%

Patch

150.0%

Referenced assets2 URLs

By indicator

Classification over time

Date	Total	Labels

2026-04-07	1	Disclosure1
2026-08-03	1	Patch1

Full discourse2 posts

Ali shmery@Alishmery267d
Patch
CVE-2026-39360 in @RustFSofficial UploadPartCopy lacks a source authorization check allowing cross tenant data exfiltration without s3:GetObject Affected: alpha.1 to alpha.90 Fixed: alpha.91 https://nvd.nist.gov/vuln/detail/CVE-2026-39360 #CVE #SecurityResearch #RustFS
Post summary
CVE‑2026‑39360 in RustFS creates a cross‑tenant data exfiltration flaw by missing source authorization checks; the issue is fixed as of version alpha.91.
3003099
16 followersView on X
CVE@CVEnew185d
Disclosure
CVE-2026-39360 RustFS is a distributed object storage system built in Rust. Prior to alpha.90, RustFS contains a missing authorization check in the multipart copy path (UploadPartCo… https://www.cve.org/CVERecord?id=CVE-2026-39360
Post summary
RustFS was disclosed to have a missing authorization check in its multipart copy path, but no PoC, exploit code, patch, or evidence of active exploitation is provided.
0000098
57.0K followersView on X

CPE platform detail89 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

89 of 89 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-
App	rustfs	rustfs	1.0.0	rust	-

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