CVE-2026-46685

MEDIUMNVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 99% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
6.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.0Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.0
EG Score
6.0(medium)
EPSS
1.4%
KEV
Not listed

Published

May 28, 2026

Last Modified

May 29, 2026

Advisory Details (1)

Auto-updated May 29, 2026
Patch available. Sources: github.
github Patch Available

Reflective CORS with credentials on RustFS S3 listener · Advisory · rustfs/rustfs · GitHub

https://github.com/rustfs/rustfs/security/advisories/GHSA-x5xv-223c-8vm7

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-20 17:08 UTCEPSS rescore
  3. 2026-07-19 14:31 UTCEPSS rescore
  4. 2026-07-16 17:03 UTCEPSS rescore
  5. 2026-07-15 16:57 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-13 22:30 UTCEPSS rescore
  8. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-08 15:16 UTCEPSS rescore
  11. 2026-07-07 13:46 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-01 15:07 UTCEPSS rescore
  15. 2026-06-30 23:22 UTCEPSS rescore
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-28 14:07 UTCEPSS rescore
  19. 2026-06-28 04:56 UTCEPSS rescore
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-27 03:08 UTCEPSS rescore
  22. 2026-06-23 21:33 UTCEPSS rescore
  23. 2026-06-23 21:33 UTCEPSS rescore
  24. 2026-06-22 14:25 UTCEPSS rescore
  25. 2026-06-22 14:25 UTCEPSS rescore
Show 33 more
  1. 2026-06-19 19:26 UTCEPSS rescore
  2. 2026-06-19 19:26 UTCEPSS rescore
  3. 2026-06-18 17:52 UTCEPSS rescore
  4. 2026-06-18 17:52 UTCEPSS rescore
  5. 2026-06-17 17:53 UTCEPSS rescore
  6. 2026-06-16 17:53 UTCEPSS rescore
  7. 2026-06-15 17:49 UTCEPSS rescore
  8. 2026-06-13 23:00 UTCEPSS rescore
  9. 2026-06-12 23:12 UTCEPSS rescore
  10. 2026-06-12 23:12 UTCEPSS rescore
  11. 2026-06-11 14:00 UTCEPSS rescore
  12. 2026-06-10 22:18 UTCEPSS rescore
  13. 2026-06-08 14:17 UTCEPSS rescore
  14. 2026-06-08 14:17 UTCEPSS rescore
  15. 2026-06-07 15:25 UTCEPSS rescore
  16. 2026-06-07 15:25 UTCEPSS rescore
  17. 2026-06-06 13:47 UTCEPSS rescore
  18. 2026-06-06 13:47 UTCEPSS rescore
  19. 2026-06-05 22:47 UTCEPSS rescore
  20. 2026-06-05 06:10 UTCEPSS rescore
  21. 2026-06-05 06:10 UTCEPSS rescore
  22. 2026-06-04 13:12 UTCEPSS rescore
  23. 2026-06-04 13:12 UTCEPSS rescore
  24. 2026-06-02 20:13 UTCEPSS rescore
  25. 2026-06-01 13:52 UTCEPSS rescore
  26. 2026-06-01 13:52 UTCEPSS rescore
  27. 2026-05-31 22:30 UTCEPSS rescore
  28. 2026-05-31 22:30 UTCEPSS rescore
  29. 2026-05-31 00:16 UTCEPSS rescore
  30. 2026-05-31 00:16 UTCEPSS rescore
  31. 2026-05-29 13:44 UTCEPSS rescore
  32. 2026-05-29 13:44 UTCEPSS rescore
  33. 2026-05-28 18:47 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-46685?
CVE-2026-46685 is a medium vulnerability published on May 28, 2026. RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, when RUSTFSCORSALLOWED_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…
When was CVE-2026-46685 disclosed?
CVE-2026-46685 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on May 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46685 actively exploited?
CVE-2026-46685 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46685?
CVE-2026-46685 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2026-46685?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46685, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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