CVE-2019-12760: Parso Project Parso

Low severity, CVSS 3.3. EPSS: 1.5% chance of exploitation in the next 30 days.

A deserialization vulnerability exists in the way parso through 0.4.0 handles grammar parsing from the cache. Cache loading relies on pickle and, provided that an evil pickle can be written to a cache grammar file and that its parsing can be triggered, this flaw leads to Arbitrary Code Execution. NOTE: This is disputed because "the cache directory is not under control of the attacker in any common configuration.

Affected products

• Parso Project Parso: up to and including 0.4.0

Published 2019-06-06. Last modified 2026-06-17.