Description
When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.
Published: 2026-10-08
Score: 7.5 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 09 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

Fri, 09 Oct 2026 01:30:00 +0000

Type Values Removed Values Added
First Time appeared Go Standard Library
Go Standard Library net/http
Vendors & Products Go Standard Library
Go Standard Library net/http

Fri, 09 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400

Fri, 09 Oct 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Thu, 08 Oct 2026 23:00:00 +0000

Type Values Removed Values Added
Description When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and ServeFile(FS) can consume an excessive amount of CPU.
Title Lack of limit on size of parsed Range headers in net/http
References

Subscriptions

Go Standard Library Net/http
cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-10-08T22:53:59.148Z

Reserved: 2026-08-24T23:36:15.738Z

Link: CVE-2026-78667

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T23:17:03.880

Modified: 2026-10-08T23:17:03.880

Link: CVE-2026-78667

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-08T22:53:59Z

Links: CVE-2026-78667 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T02:15:20Z

Weaknesses