Vulnerability DatabaseCVE-2026-78667
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CVE-2026-78667
Published:October 08, 2026
Updated:October 09, 2026
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.
Affected Packages
https://github.com/golang/go.git (GITHUB):
Affected version(s) >=go1 <go1.26.9
Fix Suggestion:
Update to version go1.26.9
https://github.com/golang/go.git (GITHUB):
Affected version(s) >=go1.27.0 <go1.27.2
Fix Suggestion:
Update to version go1.27.2
github.com/golang/go (GO):
Affected version(s) >=go1.27.0 <go1.27.2
Fix Suggestion:
Update to version go1.27.2
github.com/golang/go (GO):
Affected version(s) >=go1 <go1.26.9
Fix Suggestion:
Update to version go1.26.9
Related Resources (5)
https://nvd.nist.gov/vuln/detail/CVE-2026-78667
https://go.dev/issue/81858
https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
https://go.dev/cl/847309
https://pkg.go.dev/vuln/GO-2026-6609
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH