CVE-2026-46685
📛 CVE Title
RustFS: Reflective CORS with credentials on S3 listener; unauthenticated license metadata endpoint on console
Description
RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, when RUSTFS_CORS_ALLOWED_ORIGINS is unset, the RustFS S3 listener's ConditionalCorsLayer reflects any request Origin value back as Access-Control-Allow-Origin and also sets Access-Control-Allow-Credentials: true and Access-Control-Allow-Headers: * on responses, including preflight responses and error responses. This creates a permissive cross-domain policy with untrusted origins. A browser visiting an attacker-controlled page can issue credentialed cross-origin requests to a reachable RustFS deployment and read the response when the victim browser has ambient credentials for the RustFS origin, such as saved HTTP Basic Auth credentials, reverse-proxy SSO cookies, or TLS client certificates. This vulnerability is fixed in 1.0.0-beta.2.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- GitHub_M
- CVSS severity
- MEDIUM
- CVSS score
- 6.0 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N- Effective score
- 6.0 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-306,CWE-346,CWE-942 - Reserved
- 2026-05-15
- Published
- 2026-05-28 18:41 UTC
- Last updated
- 2026-05-28 19:22 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/46xxx/CVE-2026-46685.json
- Linked Threat
- CVE-2026-46685 — CVE-2026-46685
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-05-28 19:16:39 UTC
- NVD last modified
- 2026-06-17 10:53:50 UTC
- EPSS score
- 0.0011 (probability of exploitation in next 30 days)
- EPSS percentile
- 1.39% vs all CVEs — higher = more likely to be exploited, as of 2026-07-27
NVD / KEV / EPSS data refreshed 2026-07-28 13:34 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-32999 - Assigner
- GitHub_M
- Published
- May 28, 2026, 6:41:35 PM
- Updated
- May 28, 2026, 7:22:19 PM
- EUVD base score (CVSS 4.0)
-
6.0 / 10
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N - EUVD-reported EPSS
- 0.1100
- Vendors
- rustfs
- Products
-
rustfs (< 1.0.0-beta.2)
ENISA description: RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, when RUSTFS_CORS_ALLOWED_ORIGINS is unset, the RustFS S3 listener's ConditionalCorsLayer reflects any request Origin value back as Access-Control-Allow-Origin and also sets Access-Control-Allow-Credentials: true and Access-Control-Allow-Headers: * on responses, including preflight responses and error responses. This creates a permissive cross-domain policy with untrusted origins. A browser visiting an attacker-controlled page can issue credentialed cross-origin requests to a reachable RustFS deployment and read the response when the victim browser has ambient credentials for the RustFS origin, such as saved HTTP Basic Auth credentials, reverse-proxy SSO cookies, or TLS client certificates. This vulnerability is fixed in 1.0.0-beta.2.
EUVD references (1)
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| rustfs | rustfs |
< 1.0.0-beta.2 (affected)
|
— |
Vendor references (1)
References embedded in the original CVE record by the assigning CNA.
- https://github.com/rustfs/rustfs/security/advisories/GHSA-x5xv-223c-8vm7 x_refsource_CONFIRM
Web references (4)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://github.com/rustfs/rustfs/security/advisories/GHSA-x5xv-223c-8vm7 tenable:github.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-46685 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-46685 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (2)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://github.com/rustfs/rustfs/security/advisories/GHSA-x5xv-223c-8vm7 security-advisories@github.com
- https://github.com/rustfs/rustfs/security/advisories/GHSA-x5xv-223c-8vm7 134c704f-9b21-4f2e-91b3-4a467353bcc0
Remediations (17)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:cyberinsider.com
Google has released the June 2026 Android security updates, addressing a zero-day flaw that is under active, targeted exploitation.
2026-06-08 15:50 UTC -
web:cybersecuritynews.com
Fortinet released security advisories on May 12, 2026 , addressing five vulnerabilities spanning its wireless access point controllers, network operating system, and enterprise management platforms, including a critical unauthenticated authorization bypass in FortiSandbox. Critical Flaw in FortiSandbox The most severe vulnerability disclosed is CVE - 2026 -26083 (FG-IR-26-136), a missing ...
2026-06-08 15:50 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-06-08 15:50 UTC -
web:techcommunity.microsoft.com
We wanted to tell you how to address the Exchange Server May 2026 vulnerability CVE - 2026 -42897.
2026-06-08 15:50 UTC -
web:www.cisa.gov
If vulnerabilities cannot be remediated within the recommended timeframes, develop a remediation plan for action and coordination across the organization. The remediation plan should include: Vulnerability remediation constraints Interim mitigation actions to overcome constraints Final actions required to remediate vulnerability
2026-06-08 15:50 UTC -
web:www.crowdstrike.com
Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.
2026-06-08 15:50 UTC -
web:www.helpnetsecurity.com
The fix will be rolled into the June Patch Tuesday release. The June Patch Tuesday release will contain a fix for the failures and errors when installing KB5089549 for Windows 11.
2026-06-08 15:50 UTC -
web:www.msn.com
Android device owners worldwide face an active threat after Google confirmed that a zero-day vulnerability in its mobile operating system had been exploited before a patch was available. The flaw ...
2026-06-08 15:50 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-06-08 15:50 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-06-08 15:50 UTC -
web:cybersecuritynews.com
Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.
2026-06-19 02:28 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-06-19 02:28 UTC -
web:learn.microsoft.com
Windows 11, version 25H2 is now available for all eligible devices. Devices running Home and Pro editions of Windows 11 that are not managed by IT departments will receive the update to Windows 11, version 25H2 through the machine learning-based intelligent rollout.
2026-06-19 02:28 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-06-19 02:28 UTC -
web:www.computerworld.com
Microsoft says it is considering a patch for a zero-day vulnerability, dubbed YellowKey, that allows attackers with access to a Windows device to bypass Bitlocker encryption protection and read ...
2026-06-19 02:28 UTC -
web:www.malwarebytes.com
Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.
2026-06-19 02:28 UTC -
web:www.rapid7.com
Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday, including an HTTP/2 denial of service vulnerability and an elevation of privilege vulnerability in PowerToys.
2026-06-19 02:28 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-46685.json.
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