CVE-2026-40937

RustFS missing admin authorization on notification target endpoints, which allows unauthenticated configuration of event webhooks

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.

CVSS 3.1 · 8.3 High EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2026-27822

Rust has Critical Stored XSS in Preview Modal, leading to Administrative Account Takeover

RustFS is a distributed object storage system built in Rust. Prior to version 1.0.0-alpha.83, a Stored Cross-Site Scripting (XSS) vulnerability in the RustFS Console allows an attacker to execute arbitrary JavaScript in the context of the management console. By bypassing the PDF preview logic, an attacker can steal administrator credentials from `localStorage`, leading to full account takeover and system compromise. Version 1.0.0-alpha.83 fixes the issue.

CVSS 3.1 · 9.1 Critical EPSS 5.1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2026-22782

RustFS RPC signature verification logs shared secret

RustFS is a distributed object storage system built in Rust. From >= 1.0.0-alpha.1 to 1.0.0-alpha.79, invalid RPC signatures cause the server to log the shared HMAC secret (and expected signature), which exposes the secret to log readers and enables forged RPC calls. In crates/ecstore/src/rpc/http_auth.rs, the invalid signature branch logs sensitive data. This log line includes secret and expected_signature, both derived from the shared HMAC key. Any invalidly signed request triggers this path. The function is reachable from RPC and admin request handlers. This vulnerability is fixed in 1.0.0-alpha.80.

CVSS 4.0 · 2.9 Low EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2026-22042

RustFS has IAM Incorrect Authorization in ImportIam that Allows Privilege Escalation

RustFS is a distributed object storage system built in Rust. Prior to version 1.0.0-alpha.79, he `ImportIam` admin API validates permissions using `ExportIAMAction` instead of `ImportIAMAction`, allowing a principal with export-only IAM permissions to perform import operations. Since importing IAM data performs privileged write actions (creating/updating users, groups, policies, and service accounts), this can lead to unauthorized IAM modification and privilege escalation. Version 1.0.0-alpha.79 fixes the issue.

CVSS 4.0 · 5.7 Medium EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2026-22043

RustFS has IAM deny_only Short-Circuit that Allows Privilege Escalation via Service Account Minting

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, a flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent’s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions. Version 1.0.0-alpha.79 fixes the issue.

CVSS 4.0 · 5.7 Medium EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2026-21862

RustFS sourceIp bypass via spoofed X-Forwarded-For/Real-IP headers

RustFS is a distributed object storage system built in Rust. Prior to version alpha.78, IP-based access control can be bypassed: get_condition_values trusts client-supplied X-Forwarded-For/X-Real-Ip without verifying a trusted proxy, so any reachable client can spoof aws:SourceIp and satisfy IP-allowlist policies. This issue has been patched in version alpha.78.

CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2026-24762

RustFS Logs Sensitive Credentials in Plaintext

RustFS is a distributed object storage system built in Rust. From versions alpha.13 to alpha.81, RustFS logs sensitive credential material (access key, secret key, session token) to application logs at INFO level. This results in credentials being recorded in plaintext in log output, which may be accessible to internal or external log consumers and could lead to compromise of sensitive credentials. This issue has been patched in version alpha.82.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2026-27607

RustFS's Missing Post Policy Validation leads to Arbitrary Object Write

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.

CVSS 3.1 · 8.1 High EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2026-39360

RustFS has an authorization bypass in multipart UploadPartCopy enables cross-bucket object exfiltration

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.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2025-68926

RustFS has a gRPC Hardcoded Token Authentication Bypass

RustFS is a distributed object storage system built in Rust. In versions prior to 1.0.0-alpha.78, RustFS implements gRPC authentication using a hardcoded static token `"rustfs rpc"` that is publicly exposed in the source code repository, hardcoded on both client and server sides, non-configurable with no mechanism for token rotation, and universally valid across all RustFS deployments. Any attacker with network access to the gRPC port can authenticate using this publicly known token and execute privileged operations including data destruction, policy manipulation, and cluster configuration changes. Version 1.0.0-alpha.78 contains a fix for the issue.

CVSS 3.1 · 9.8 Critical EPSS 32.1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2025-68705

RustFS Path Traversal Vulnerability

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 to 1.0.0-alpha.78, RustFS contains a path traversal vulnerability in the /rustfs/rpc/read_file_stream endpoint. This issue has been patched in version 1.0.0-alpha.79.

CVSS 4.0 · 8.8 High EPSS 7.3% KEV · Not listed

Vendors

Rustfs

Products

Rustfs

CVE-2025-69255

RustFS gRPC GetMetrics deserialization panic enables remote DoS

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 to 1.0.0-alpha.77, a malformed gRPC GetMetrics request causes get_metrics to unwrap() failed deserialization of metric_type/opts, panicking the handler thread and enabling remote denial of service of the metrics endpoint. This issue has been patched in version 1.0.0-alpha.78.

CVSS 4.0 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Rustfs

Products

Rustfs