CVE-2026-45043

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 87% 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, secondary
Elevated
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: Elevated riskExposed: 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, improper validation in the PUT /rustfs/admin/v3/import-iam endpoint allows a user with ImportIAMAction to create service accounts under arbitrary parent identities, including the root user (minioadmin). The endpoint accepts attacker-controlled parent, claims, accessKey, and secretKey values without enforcing privilege boundaries or sanitization. This enables privilege escalation to full administrative access using a persistent, attacker-defined credential. This vulnerability is fixed in 1.0.0-beta.2.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
58(Track*)
EG Risk 58/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity93% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

May 29, 2026

Last Modified

July 21, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

ImportIam Allows Creation of Backdoor Service Accounts Under Any Parent Including Root · Advisory · rustfs/rustfs · GitHub

https://github.com/rustfs/rustfs/security/advisories/GHSA-566f-q62r-wcr8

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 46× 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.

Showing the most recent 100 of 127 total refreshes for this CVE.

  1. 2026-08-30 19:17 UTCEPSS rescore
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 14:25 UTCEPSS rescore
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  7. 2026-08-25 04:28 UTCEG score recompute
  8. 2026-08-22 00:19 UTCEG score recompute
  9. 2026-08-21 23:49 UTCEPSS rescore
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  12. 2026-08-20 10:29 UTCEG score recompute
  13. 2026-08-19 17:04 UTCEPSS rescore
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  15. 2026-08-17 14:39 UTCEG score recompute
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  17. 2026-08-16 15:02 UTCEG score recompute
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  24. 2026-08-13 22:00 UTCEPSS rescore
  25. 2026-08-12 17:34 UTCEG score recompute
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  1. 2026-08-12 13:51 UTCEPSS rescore
  2. 2026-08-11 14:55 UTCEG score recompute
  3. 2026-08-11 03:42 UTCEG score recompute
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  5. 2026-08-09 16:31 UTCEG score recompute
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  8. 2026-08-08 16:37 UTCEPSS rescore
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  13. 2026-08-05 19:17 UTCEPSS rescore
  14. 2026-08-04 23:16 UTCEG score recompute
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  20. 2026-08-02 02:27 UTCEPSS rescore
  21. 2026-08-01 14:06 UTCEG score recompute
  22. 2026-08-01 04:16 UTCEPSS rescore
  23. 2026-07-31 05:55 UTCEG score recompute
  24. 2026-07-30 16:28 UTCEPSS rescore
  25. 2026-07-30 01:30 UTCEPSS rescore
  26. 2026-07-29 12:03 UTCEG score recompute
  27. 2026-07-28 15:36 UTCEPSS rescore
  28. 2026-07-28 04:09 UTCEG score recompute
  29. 2026-07-27 14:13 UTCEPSS rescore
  30. 2026-07-27 09:13 UTCEG score recompute
  31. 2026-07-26 14:54 UTCEPSS rescore
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  33. 2026-07-25 14:18 UTCEPSS rescore
  34. 2026-07-24 14:17 UTCEPSS rescore
  35. 2026-07-23 14:18 UTCEPSS rescore
  36. 2026-07-23 03:16 UTCEG score recompute
  37. 2026-07-22 14:08 UTCEPSS rescore
  38. 2026-07-21 15:24 UTCEPSS rescore
  39. 2026-07-20 17:08 UTCEPSS rescore
  40. 2026-07-19 14:31 UTCEPSS rescore
  41. 2026-07-19 02:29 UTCEPSS rescore
  42. 2026-07-18 10:04 UTCEPSS rescore
  43. 2026-07-16 17:03 UTCEPSS rescore
  44. 2026-07-15 16:57 UTCEPSS rescore
  45. 2026-07-15 02:00 UTCEPSS rescore
  46. 2026-07-13 22:30 UTCEPSS rescore
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  49. 2026-07-11 08:27 UTCEPSS rescore
  50. 2026-07-09 19:10 UTCEPSS rescore
  51. 2026-07-08 15:16 UTCEPSS rescore
  52. 2026-07-07 13:46 UTCEPSS rescore
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  58. 2026-06-30 23:22 UTCEPSS rescore
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  64. 2026-06-27 03:08 UTCEPSS rescore
  65. 2026-06-25 13:49 UTCEPSS rescore
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  67. 2026-06-23 21:33 UTCEPSS rescore
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  70. 2026-06-21 14:56 UTCEPSS rescore
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  72. 2026-06-21 01:59 UTCEPSS rescore
  73. 2026-06-19 19:25 UTCEPSS rescore
  74. 2026-06-17 17:53 UTCEPSS rescore
  75. 2026-06-16 17:52 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-45043?
CVE-2026-45043 is a critical vulnerability published on May 29, 2026. RustFS is a distributed object storage system built in Rust. Prior to 1.0.0-beta.2, improper validation in the PUT /rustfs/admin/v3/import-iam endpoint allows a user with ImportIAMAction to create service accounts under arbitrary parent identities, including the root user (minioadmin). The endpoint…
When was CVE-2026-45043 disclosed?
CVE-2026-45043 was first published in the National Vulnerability Database on May 29, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45043 actively exploited?
CVE-2026-45043 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 86.8% of all scored CVEs.
What is the CVSS score of CVE-2026-45043?
CVE-2026-45043 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-45043?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45043, 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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