What’s Vulnerable › Vulnerabilities

CVE-2019-12760

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-06-06 · updated 2026-06-17
• Weakness: CWE-502

Description

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: through 0.4.0

References

• https://gist.github.com/dhondta/f71ae7e5c4234f8edfd2f12503a5dcc7
• https://github.com/davidhalter/parso/issues/75
• https://gist.github.com/dhondta/f71ae7e5c4234f8edfd2f12503a5dcc7
• https://github.com/davidhalter/parso/issues/75

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