CVE-2026-24000

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 66% 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
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

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

Fleet is open source device management software. Prior to version 4.80.1, Fleet trusted client-supplied IP address headers when determining the source IP for incoming requests. This allowed authenticated and unauthenticated clients to spoof their apparent IP address and bypass per-IP rate limiting controls. Fleet determines a client’s public IP address using HTTP headers such as X-Forwarded-For, X-Real-IP, and/or True-Client-IP. These headers were trusted without validation. An attacker could supply arbitrary values in these headers, causing Fleet to treat each request as originating from a different IP address. This could allow an attacker to bypass per-IP rate limits and increase the effectiveness of brute-force or password-spraying attempts against authentication endpoints. This issue does not allow authentication bypass, privilege escalation, data exposure, or remote code execution on its own. Version 4.80.1 contains a patch. As a workaround, run Fleet behind a trusted reverse proxy or load balancer that overwrites client IP headers.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
34.6%
KEV
Not listed

Published

May 14, 2026

Last Modified

May 15, 2026

Advisory Details (2)

Auto-updated Jun 17, 2026
Patch available. Sources: github_release, github.
github Patch Available

Rate limiting bypass via untrusted client IP headers · Advisory · fleetdm/fleet · GitHub

https://github.com/fleetdm/fleet/security/advisories/GHSA-j8h8-75h3-jg53
github_release Patch Available

fleet-v4.80.1

Patch available: fleetdm/fleet fleet-v4.80.1

https://github.com/fleetdm/fleet/releases/tag/fleet-v4.80.1

Vendor Advisories for CVE-2026-24000(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/fleetdm/fleet/v4—4.80.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 54× 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 115 total refreshes for this CVE.

  1. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
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  15. 2026-06-30 23:22 UTCEPSS rescore
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  17. 2026-06-29 21:48 UTCEG score recompute
  18. 2026-06-29 14:06 UTCEPSS rescore
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  21. 2026-06-28 04:56 UTCEPSS rescore
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  23. 2026-06-27 22:37 UTCEG score recompute
  24. 2026-06-27 03:08 UTCEPSS rescore
  25. 2026-06-26 20:21 UTCEG score recompute
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  1. 2026-06-25 19:06 UTCEG score recompute
  2. 2026-06-25 13:49 UTCEPSS rescore
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  6. 2026-06-23 21:33 UTCEPSS rescore
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  10. 2026-06-21 14:56 UTCEPSS rescore
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  19. 2026-06-17 00:22 UTCEG score recompute
  20. 2026-06-16 17:52 UTCEPSS rescore
  21. 2026-06-15 23:55 UTCEG score recompute
  22. 2026-06-15 17:48 UTCEPSS rescore
  23. 2026-06-14 23:18 UTCEPSS rescore
  24. 2026-06-14 11:08 UTCEG score recompute
  25. 2026-06-13 23:00 UTCEPSS rescore
  26. 2026-06-13 10:45 UTCEG score recompute
  27. 2026-06-12 23:12 UTCEPSS rescore
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  29. 2026-06-12 10:01 UTCEG score recompute
  30. 2026-06-11 14:00 UTCEPSS rescore
  31. 2026-06-11 09:33 UTCEG score recompute
  32. 2026-06-10 22:18 UTCEPSS rescore
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  35. 2026-06-10 09:10 UTCEG score recompute
  36. 2026-06-09 08:48 UTCEG score recompute
  37. 2026-06-08 14:17 UTCEPSS rescore
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  39. 2026-06-08 08:25 UTCEG score recompute
  40. 2026-06-07 15:25 UTCEPSS rescore
  41. 2026-06-07 15:25 UTCEPSS rescore
  42. 2026-06-07 15:25 UTCEPSS rescore
  43. 2026-06-07 08:02 UTCEG score recompute
  44. 2026-06-06 13:47 UTCEPSS rescore
  45. 2026-06-06 13:47 UTCEPSS rescore
  46. 2026-06-06 07:40 UTCEG score recompute
  47. 2026-06-05 22:47 UTCEPSS rescore
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  49. 2026-06-05 07:17 UTCEG score recompute
  50. 2026-06-05 06:10 UTCEPSS rescore
  51. 2026-06-05 06:10 UTCEPSS rescore
  52. 2026-06-04 13:12 UTCEPSS rescore
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  54. 2026-06-04 13:12 UTCEPSS rescore
  55. 2026-06-04 06:54 UTCEG score recompute
  56. 2026-06-03 06:31 UTCEG score recompute
  57. 2026-06-02 20:13 UTCEPSS rescore
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  59. 2026-06-02 06:08 UTCEG score recompute
  60. 2026-06-01 13:51 UTCEPSS rescore
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  63. 2026-06-01 05:45 UTCEG score recompute
  64. 2026-05-31 00:16 UTCEPSS rescore
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  66. 2026-05-31 00:16 UTCEPSS rescore
  67. 2026-05-29 13:44 UTCEPSS rescore
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  69. 2026-05-28 13:44 UTCEPSS rescore
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  72. 2026-05-27 13:40 UTCEPSS rescore
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  75. 2026-05-26 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-24000?
CVE-2026-24000 is a medium vulnerability published on May 14, 2026. Fleet is open source device management software. Prior to version 4.80.1, Fleet trusted client-supplied IP address headers when determining the source IP for incoming requests. This allowed authenticated and unauthenticated clients to spoof their apparent IP address and bypass per-IP rate limiting…
When was CVE-2026-24000 disclosed?
CVE-2026-24000 was first published in the National Vulnerability Database on May 14, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-24000 actively exploited?
CVE-2026-24000 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-24000?
CVE-2026-24000 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-24000?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-24000, 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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