CVEvulnerability
CVE-2026-78660
7.5 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-10-08
- Last modified
- 2026-10-09
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-444
Description
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.
Related
Weakness · CWE (1)
- CWE-444 Inconsistent Interpretation of HTTP Requests weakness
References
- https://go.dev/cl/835145 go.dev
- https://go.dev/cl/836385 go.dev
- https://go.dev/issue/81115 go.dev
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI groups.google.com
- https://pkg.go.dev/vuln/GO-2026-6610 pkg.go.dev