Missing Authorization Affecting backup-restore-operator-8.1 package, versions <8.1.4-r2


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

Social Trends
EPSS
0.37% (30th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-BACKUPRESTOREOPERATOR81-17117600
  • published1 Jun 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39831  (opens in a new tab)
CWE-862  (opens in a new tab)

How to fix?

Upgrade Chainguard backup-restore-operator-8.1 to version 8.1.4-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream backup-restore-operator-8.1 package and not the backup-restore-operator-8.1 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

The Verify() method for FIDO/U2F security key types (sk-ecdsa-sha2-nistp256@openssh.com, sk-ssh-ed25519@openssh.com) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.

CVSS Base Scores

version 3.1