CVE-2026-56854 Affecting telegraf-1.39 package, versions <1.39.3-r4


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.33% (25th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-TELEGRAF139-19430461
  • published30 Aug 2026
  • disclosed28 Aug 2026

Introduced: 28 Aug 2026

NewCVE-2026-56854  (opens in a new tab)

How to fix?

Upgrade Chainguard telegraf-1.39 to version 1.39.3-r4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream telegraf-1.39 package and not the telegraf-1.39 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

The source-address critical option in the Permissions returned by an authentication callback was only enforced for the PublicKeyCallback and VerifiedPublicKeyCallback paths, extending the fix for CVE-2026-46595. Permissions returned by the PasswordCallback, KeyboardInteractiveCallback, NoClientAuthCallback, and GSSAPIWithMICConfig.AllowLogin callbacks were not validated against the client's remote address, so a source-address restriction set by those callbacks was silently ignored. The check is now applied to the Permissions returned by any authentication callback.

CVSS Base Scores

version 3.1