CVE-2020-15163: Linuxfoundation The Update Framework

High severity, CVSS 8.2. EPSS: 0.7% chance of exploitation in the next 30 days.

Python TUF (The Update Framework) reference implementation before version 0.12 it will incorrectly trust a previously downloaded root metadata file which failed verification at download time. This allows an attacker who is able to serve multiple new versions of root metadata (i.e. by a person-in-the-middle attack) culminating in a version which has not been correctly signed to control the trust chain for future updates. This is fixed in version 0.12 and newer.

Affected products

• Linuxfoundation The Update Framework: before 0.12.0 (fixed in 0.12.0)

Published 2020-09-09. Last modified 2026-06-17.