HTTP Request Smuggling Affecting go-toolset package, versions <0:1.26.10-1.el10_2


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.3% (22nd percentile)

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  • Snyk IDSNYK-RHEL10-GOTOOLSET-21449540
  • published23 Oct 2026
  • disclosed8 Oct 2026

Introduced: 8 Oct 2026

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

How to fix?

Upgrade RHEL:10 go-toolset to version 0:1.26.10-1.el10_2 or higher.
This issue was patched in RHSA-2026:86093.

NVD Description

Note: Versions mentioned in the description apply only to the upstream go-toolset package and not the go-toolset package as distributed by RHEL. See How to fix? for RHEL:10 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