CVE-2019-10135: A flaw was found in the yaml.load() function in the osbs-client versions since 0.46 before 0.56.1

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HIGH 7.2UPGRADE

CVE-2019-10135 is a high-severity flaw (CVSS 7.2) affecting osbs-client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in the yaml.load() function in the osbs-client versions since 0.46 before 0.56.1. Insecure use of the yaml.load() function allowed the user to load any suspicious object for code execution via the parsing of malicious YAML files.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-502
Published	2019-07-11
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: osbs-client project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-07-11 19:15 UTCPublished CVE record published
2026-06-17 02:10 UTCUpdated Record last modified

osbs-client project osbs-client UPGRADE

Affected: >= 0.46 and < 0.56.1

Fixed in: 0.56.1

Safe to downgrade to: a release before 0.46

1. Check installed version

apt-cache policy osbs-client || rpm -q osbs-client || osbs-client --version

2. UPGRADE to 0.56.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade osbs-client

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade osbs-client

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 0.46 (Debian / Ubuntu)

apt-cache madison osbs-client sudo apt install osbs-client=<VERSION_BEFORE_0.46> sudo apt-mark hold osbs-client

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

dnf --showduplicates list osbs-client sudo dnf downgrade osbs-client-<VERSION_BEFORE_0.46> sudo dnf versionlock add osbs-client

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-2019-10135?

osbs-client: upgrade to 0.56.1. Exact commands for each OS are on this page.

Is CVE-2019-10135 being exploited?

CVE-2019-10135 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-2019-10135 affect?

CVE-2019-10135 affects osbs-client. Severity is high (CVSS 7.2). A flaw was found in the yaml.load() function in the osbs-client versions since 0.46 before 0.56.1. Insecure use of the yaml.load() function allowed the user to load any suspicious object for code execution via the parsing of malicious YAML

How urgent is CVE-2019-10135?

Priority 45/100. High severity

References

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