CVE-2026-40937Disclosure(rustfs / rustfs)

LOWCVSS 8.3 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-alpha.94, all four notification target admin API endpoints in `rustfs/src/admin/handlers/event.rs` use a `check_permissions` helper that validates authentication only (access key + session token), without performing any admin-action authorization via `validate_admin_request`. Every other admin handler in the codebase correctly calls `validate_admin_request` with a specific `AdminAction`. This is the only admin handler file that skips authorization. A non-admin user can overwrite a shared admin-defined notification target by name, causing subsequent bucket events to be delivered to an attacker-controlled endpoint. This enables cross-user event interception and audit evasion. 1.0.0-alpha.94 contains a patch.

rustfs CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://github.com/rustfs/rustfs/security/advisories/GHSA-pfcq-4gjr-6gjm

Other references

https://github.com/rustfs/rustfs/releases/tag/1.0.0-alpha.94

Weakness type (CWE)

CWE-862

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

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

3 mentions across 2 observed days
Momentum state: stable

What's happening

Technical details provided in 1 signal
Disclosure: 2 classified signals
General: 1 classified signal
Peaked 1d ago at 2 mentions (2026-04-23); latest day: 1
3 total mentions across 2 days

Affected systems

Vendors

rustfs

Products

rustfs

1 version affected across 1 product

Deep dive

Activity timeline3 mentions / 2d

Signal classification2 categories

Disclosure

266.7%

General

133.3%

Referenced assets2 URLs

By indicator

Classification over time

Date	Total	Labels

2026-04-23	2	Disclosure1General1
2026-04-30	1	Disclosure1

Full discourse3 posts

CVE@CVEnew168d
General
CVE-2026-40937 RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-alpha.94, all four notification target admin API endpoints in `rustfs/src/admin/handlers/e… https://www.cve.org/CVERecord?id=CVE-2026-40937
Post summary
The snippet references CVE-2026-40937 for RustFS but offers only a brief mention of affected endpoints and version, without details on exploitation or mitigation.
00010141
57.2K followersView on X
selva@SelvaKtm2161d
Disclosure
CVE-2026-40937: RustFS Webhook Hijack Exposes S3 Event Data https://thecybrdef.com/cve-2026-40937-rustfs-webhook-hijack-vulnerability/ #CVE202640937 #RustFS #CyberSecurity
Post summary
The text announces a new RustFS webhook hijack vulnerability (CVE‑2026‑40937) that exposes S3 event data, but it does not provide PoC code, exploit details, patches, or evidence of active exploitation.
0000040
4 followersView on X
cybersecuritypath@cybrsecpath168d
Disclosure
CVE-2026-40937: RustFS Webhook Hijack Exposes S3 Event Data https://thecybrdef.com/cve-2026-40937-rustfs-webhook-hijack-vulnerability/ #CVE202640937 #RustFS #CyberSecurity
Post summary
The text announces a new vulnerability, CVE-2026-40937, where RustFS webhook hijacking exposes S3 event data, but provides no PoC, exploit, patch, or evidence of active use.
0000060
6 followersView on X

CPE platform detail93 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

93 of 93 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	-
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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