Vulnerability Report: GO-2026-6609
- CVE-2026-78667
- Affects: net/http
- Published: Oct 08, 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
-
PathVersionsSymbols
-
before go1.26.9, from go1.27.0-0 before go1.27.2
Aliases
References
- https://go.dev/cl/847309
- https://go.dev/issue/81858
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
- https://vuln.go.dev/ID/GO-2026-6609.json
Credits
- Jakub Ciolek (https://ciolek.dev)
Feedback
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