How severe is CVE-2019-12760?

CVE-2019-12760 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2019-12760 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12760?

CVE-2019-12760 affects Parso Project Parso. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12760?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-12760 published?

CVE-2019-12760 was published on 2019-06-06 and last updated on 2026-06-17.

CVE-2019-12760

CVE-2019-12760 is a low-severity vulnerability in Parso Project Parso with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 6.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Parso Project Parso
Published: 2019-06-06
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2019-12760?: 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.
How severe is CVE-2019-12760?: CVE-2019-12760 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2019-12760 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12760?: CVE-2019-12760 affects Parso Project Parso. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12760?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-12760 published?: CVE-2019-12760 was published on 2019-06-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:parso_project:parso:*:*:*:*:*:*:*:*

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