CVE-2026-78660 Affecting golang-golang-x-net package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-ECHOLATEST-GOLANGGOLANGXNET-20675154
- published9 Oct 2026
- disclosed8 Oct 2026
Introduced: 8 Oct 2026
NewCVE-2026-78660 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest golang-golang-x-net.
NVD Description
Note: Versions mentioned in the description apply only to the upstream golang-golang-x-net package and not the golang-golang-x-net package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.