Improper Preservation of Permissions Affecting amazon-cloudwatch-agent package, versions <0:1.300069.1-1.amzn2


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.6% (46th percentile)

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  • Snyk IDSNYK-AMZN2-AMAZONCLOUDWATCHAGENT-18523730
  • published5 Aug 2026
  • disclosed22 May 2026

Introduced: 22 May 2026

CVE-2026-39832  (opens in a new tab)
CWE-281  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 amazon-cloudwatch-agent to version 0:1.300069.1-1.amzn2 or higher.
This issue was patched in ALAS2-2026-3844.

NVD Description

Note: Versions mentioned in the description apply only to the upstream amazon-cloudwatch-agent package and not the amazon-cloudwatch-agent package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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.

References

CVSS Base Scores

version 3.1