CVE-2020-10289: Use of unsafe yaml load

This month

HIGH 8.8MITIGATE

CVE-2020-10289 is a high-severity flaw (CVSS 8.8) affecting robot operating system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use of unsafe yaml load. Allows instantiation of arbitrary objects. The flaw itself is caused by an unsafe parsing of YAML values which happens whenever an action message is processed to be sent, and allows for the creation of Python objects. Through this flaw in the ROS core package of actionlib, an attacker with local or remote access can make the ROS Master, execute arbitrary code in Python form. Consider yaml.safe_load() instead. Located firs

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.0% (top 20%)
CISA exploited list	No
Weakness	CWE-20, CWE-502
Published	2020-08-20
Last modified	2026-06-17

Publisher (CNA): Alias Robotics S.L. · Vendor: openrobotics

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

Am I affected?

Timeline

2020-08-20 08:15 UTCPublished CVE record published
2026-06-17 02:47 UTCUpdated Record last modified

openrobotics robot operating system MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2020-10289?

robot operating system: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-10289 being exploited?

CVE-2020-10289 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-2020-10289 affect?

CVE-2020-10289 affects robot operating system. Severity is high (CVSS 8.8). Use of unsafe yaml load. Allows instantiation of arbitrary objects. The flaw itself is caused by an unsafe parsing of YAML values which happens whenever an action message is processed to be sent, and allows for the creation of Python object

How urgent is CVE-2020-10289?

Priority 51/100. High severity

Software pages

Python vulnerabilities

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References

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