Deserialization of Untrusted Data 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

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-BACKUPRESTOREOPERATOR81-17117590
  • published1 Jun 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39832  (opens in a new tab)
CWE-502  (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.

When adding a key to a remote agent constraint extensions such as restrict-destination-v00@openssh.com were not serialized in the request. Destination restrictions were silently stripped when forwarding keys, allowing unrestricted use of the key on the remote host. The client now serializes all constraint extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported constraint extensions instead of silently ignoring them.

CVSS Base Scores

version 3.1