CVE-2026-44795: Spinnaker is an open source, multi-cloud continuous delivery platform

This month

HIGH 8.8WATCHLISTUPGRADE

CVE-2026-44795 is a high-severity flaw (CVSS 8.8) affecting spinnaker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Spinnaker is an open source, multi-cloud continuous delivery platform. Prior to 2026.1.0, 2026.0.3, 2025.4.4, and 2025.3.3, unsafe YAML processing bypasses safe deserialization when using CloudFormation deployments or CloudFoundry baking. The use of a non-safe constructor allows arbitrary loading of Java classes, leading to remote code execution. This issue is fixed in versions 2026.1.0, 2026.0.3, 2025.4.4, and 2025.3.3.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-470, CWE-502
Published	2026-07-10
Last modified	2026-07-21

Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-10 22:16 UTCPublished CVE record published
2026-07-21 14:01 UTCUpdated Record last modified

linuxfoundation spinnaker UPGRADE

Affected: < 2025.3.3 · >= 2025.4.0 and < 2025.4.4 · >= 2026.0.0 and < 2026.0.3

Fixed in: 2025.3.3, 2025.4.4, 2026.0.3

Safe to downgrade to: a release before 2025.4.0

1. Check installed version

apt-cache policy spinnaker || rpm -q spinnaker || spinnaker --version

2. UPGRADE to 2025.3.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spinnaker

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spinnaker

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2025.4.0 (Debian / Ubuntu)

apt-cache madison spinnaker sudo apt install spinnaker=<VERSION_BEFORE_2025.4.0> sudo apt-mark hold spinnaker

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list spinnaker sudo dnf downgrade spinnaker-<VERSION_BEFORE_2025.4.0> sudo dnf versionlock add spinnaker

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44795?

spinnaker: upgrade to 2025.3.3, 2025.4.4, 2026.0.3. Exact commands for each OS are on this page.

Is CVE-2026-44795 being exploited?

CVE-2026-44795 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44795 affect?

CVE-2026-44795 affects spinnaker. Severity is high (CVSS 8.8). Spinnaker is an open source, multi-cloud continuous delivery platform. Prior to 2026.1.0, 2026.0.3, 2025.4.4, and 2025.3.3, unsafe YAML processing bypasses safe deserialization when using CloudFormation deployments or CloudFoundry baking. T

How urgent is CVE-2026-44795?

Priority 52/100. High severity; On your watchlist

Software pages

Java vulnerabilities

Related CVEs

CVE-2026-55175 HIGH 7.5 UPGRADE Spinnaker is an open source, multi-cloud continuous delivery platform

References

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