7.5
High
CVE-2026-78660 Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| net/http 1.26 | earliest → < 1.26.9 | 1.26.9 |
| net/http/internal/http2 1.27 | 1.27.0-0 → < 1.27.2 | 1.27.2 |
| golang.org/x/net/http2 0.60 | earliest → < 0.60.0 | 0.60.0 |
References
- go.dev go.dev
- go.dev go.dev
- go.dev go.dev
- groups.google.com groups.google.com
- pkg.go.dev pkg.go.dev
Timeline
- Published
- Last modified
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