CVE-2026-78667

UNKNOWN 0.0

Lack of limit on size of parsed Range headers in net/http

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	go standard library
Product	net/http
Published	Oct 8, 2026

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Affected Versions

Go standard library / net/http

0 < 1.26.9 1.27.0-0 < 1.27.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/cl/847309 go.dev: https://go.dev/issue/81858 groups.google.com: https://groups.google.com/g/golang-announce/c/U2fTuyDJznI pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-6609

Credits

Jakub Ciolek (https://ciolek.dev)