CVE-2026-78660 Affecting golang-1.22 package, versions <1.22.2-2~20.04.3


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.3% (22nd percentile)

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  • Snyk IDSNYK-UBUNTU2004-GOLANG122-20692766
  • published15 Oct 2026
  • disclosed8 Oct 2026

Introduced: 8 Oct 2026

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

How to fix?

Upgrade Ubuntu:20.04 golang-1.22 to version 1.22.2-2~20.04.3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream golang-1.22 package and not the golang-1.22 package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 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