CVE-2026-78659 Affecting golang-race package, versions <0:1.26.10-1.el9_8


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.57% (46th percentile)

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  • Snyk IDSNYK-ROCKY9-GOLANGRACE-21437077
  • published23 Oct 2026
  • disclosed8 Oct 2026

Introduced: 8 Oct 2026

NewCVE-2026-78659  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 golang-race to version 0:1.26.10-1.el9_8 or higher.
This issue was patched in RLSA-2026:86196.

NVD Description

Note: Versions mentioned in the description apply only to the upstream golang-race package and not the golang-race package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

When "Trailer" headers are sent by a client, the HTTP server internally uses the header values to populate the Request.Trailer map passed to the server handler. Because Request.Trailer is a map, each entry incurs memory overhead. For HTTP/2 servers, a malicious client can exploit this by sending a "Trailer" header that declares a large number of fields, causing the server to allocate a disproportionate amount of memory while bypassing Server.MaxHeaderValueCount and Server.MaxHeaderBytes limits. This exploit is not applicable for HTTP/1 servers, which do not support multiplexing a large number of requests over one TCP connection, and whose Server.MaxHeaderBytes are calculated differently.

CVSS Base Scores

version 3.1