HTTP Request Smuggling Affecting golang package, versions <0:1.26.9-1.amzn2023.0.1


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.54% (46th percentile)

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-AMZN2023-GOLANG-21700577
  • published25 Oct 2026
  • disclosed8 Oct 2026

Introduced: 8 Oct 2026

CVE-2026-78660  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 golang to version 0:1.26.9-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-3225.

NVD Description

Note: Versions mentioned in the description apply only to the upstream golang package and not the golang package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 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.

CVSS Base Scores

version 3.1