CVE-2026-46685

MEDIUMNVD 6.06.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 6.0 under NVD CVSS. EPSS exploit probability: 0.1% (1st percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS
Sources: EPSS, NVD CVSS
Elevated

Also known asEUVD-2026-32999 (ENISA EUVD)Source: ENISA EUVD

6.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.0Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

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
6.0
EG Score
6.0MEDIUMmedium confidence
EG Risk
43
EG Risk 43/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity60% × 45%
Impact severity (EG Severity): CVSS 6.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.0): severity, escalated by confirmed exploitation. This CVE's 6.0 is its impact severity (EG Severity), not escalated.

EG Severity
6.0 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 28, 2026

Last Modified

May 29, 2026

Advisory Details (1)

Auto-updated May 29, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

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 7× in last 7d / 29× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 174 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 74 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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  10. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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  12. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-10-30 14:55 UTCOSV refresh
  16. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-25 14:25 UTCEchelonGraph re-scored
  20. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-10-22 23:22 UTCEchelonGraph re-scored
  23. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
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  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-18 03:36 UTCEchelonGraph re-scored
  4. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-12 16:02 UTCEchelonGraph re-scored
  10. 2026-10-11 19:45 UTCEchelonGraph re-scored
  11. 2026-10-11 16:59 UTCEchelonGraph re-scored
  12. 2026-10-11 14:24 UTCEchelonGraph re-scored
  13. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-10-03 15:18 UTCOSV refresh
  20. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  26. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  27. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  28. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  29. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  30. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-09-14 06:38 UTCEchelonGraph re-scored
  32. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  33. 2026-09-13 02:09 UTCOSV refresh
  34. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  35. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  36. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  37. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  38. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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  40. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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  44. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  45. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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  47. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  48. 2026-08-25 04:38 UTCEchelonGraph re-scored
  49. 2026-08-23 14:26 UTCEchelonGraph re-scored
  50. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  51. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  52. 2026-08-21 15:24 UTCEchelonGraph re-scored
  53. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  54. 2026-08-20 10:43 UTCEchelonGraph re-scored
  55. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  56. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  57. 2026-08-17 07:45 UTCEchelonGraph re-scored
  58. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  59. 2026-08-16 02:32 UTCEchelonGraph re-scored
  60. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  61. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  62. 2026-08-14 11:20 UTCEchelonGraph re-scored
  63. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  64. 2026-08-13 10:24 UTCEchelonGraph re-scored
  65. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  66. 2026-08-12 09:29 UTCEchelonGraph re-scored
  67. 2026-08-11 05:07 UTCEchelonGraph re-scored
  68. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  69. 2026-08-10 04:13 UTCEchelonGraph re-scored
  70. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  71. 2026-08-09 03:18 UTCEchelonGraph re-scored
  72. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  73. 2026-08-08 02:23 UTCEchelonGraph re-scored
  74. 2026-08-07 01:28 UTCEchelonGraph re-scored
  75. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile

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Frequently asked(5)

What is CVE-2026-46685?
CVE-2026-46685 is a medium-severity vulnerability; its CVE record was published on May 28, 2026. 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…
When was the CVE record for CVE-2026-46685 published?
The CVE record for CVE-2026-46685 was published on May 28, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of May 29, 2026; the record at its source may have been updated since.
Is CVE-2026-46685 actively exploited?
CVE-2026-46685 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-46685?
CVE-2026-46685 has a CVSS base score of 6.0 (NVD).
How do I remediate CVE-2026-46685?
The CVE record for CVE-2026-46685 names the fix: "This vulnerability is fixed in 1.0.0-beta.2."

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