CVE-2026-97054 Affecting hey package, versions <0.1.5-r17


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.17% (7th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-HEY-22520223
  • published13 Nov 2026
  • disclosed11 Nov 2026

Introduced: 11 Nov 2026

NewCVE-2026-97054  (opens in a new tab)

How to fix?

Upgrade Chainguard hey to version 0.1.5-r17 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream hey package and not the hey package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

For HTTP/1 servers, when MaxBytesReader's limit is exceeded, "Connection: close" header is automatically set without synchronization, which might race with another header being set explicitly in the server handler. As a result, an HTTP/1 server that utilizes MaxBytesReader or MaxBytesHandler can crash due to runtime panic if its handler reads the request body concurrently with writing the response header.

CVSS Base Scores

version 3.1