What’s Vulnerable › Vulnerabilities

CVE-2020-10289: RVD#2401: Use of unsafe yaml load, ./src/actionlib/tools/library.py:132

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-20 · updated 2026-06-17
• Weakness: CWE-20

Description

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 first in actionlib/tools/library.py:132. See links for more info on the bug.

Affected products

• Open Source Robotics Foundation Robot Operating System (ROS): all versions

References

• https://github.com/ros/actionlib/pull/171
• https://github.com/ros/actionlib/pull/171

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