HIGH 7.5 NVD
CVE-2026-78660
Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. Howeve
Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling.
References
- https://go.dev/cl/835145
- https://go.dev/cl/836385
- https://go.dev/issue/81115
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI
- https://pkg.go.dev/vuln/GO-2026-6610
This high severity vulnerability with a CVSS score of 7.5 was published on 2026-10-08 via NVD.
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