CVE-2019-19507

Name: CVE-2019-19507
Creator: NVD / NIST
Published: 2019-12-02T17:15:13.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.97%

Last modified Jun 17, 2026

CVE-2019-19507 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. In jpv (aka Json Pattern Validator) before 2.1.1, compareCommon() can be bypassed because certain internal attributes can be overwritten via a conflicting name, as demonstrated by 'constructor': {'name':'Array'}. This affects validate(). EPSS estimates a 0.97% chance of exploitation in the next 30 days.

Description

In jpv (aka Json Pattern Validator) before 2.1.1, compareCommon() can be bypassed because certain internal attributes can be overwritten via a conflicting name, as demonstrated by 'constructor': {'name':'Array'}. This affects validate(). Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.97%

57.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Json Pattern Validator Project	Json Pattern Validator	< 2.1.1

References

https://github.com/manvel-khnkoyan/jpv/issues/6Exploit, Issue Tracking, Third Party Advisory
https://www.npmjs.com/package/jpvProduct
https://github.com/manvel-khnkoyan/jpv/issues/6Exploit, Issue Tracking, Third Party Advisory
https://www.npmjs.com/package/jpvProduct

Timeline

Published: Dec 2, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19507?

How severe is CVE-2019-19507?

CVE-2019-19507 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19507?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19507?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST