CVE-2019-19507

MEDIUM

Json Pattern Validator < 2.1.1 - Authentication Bypass via Constructor Attribute Overwrite

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/manvel-khnkoyan/jpv/issues/6
Product x_refsource_misc
https://www.npmjs.com/package/jpv

Scores

CVSS v3 5.3
EPSS 0.0097
EPSS Percentile 57.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Details

CWE
CWE-287
Status published
Products (2)
json_pattern_validator_project/json_pattern_validator < 2.1.1
npm/jpv 0 - 2.1.1npm
Published Dec 02, 2019
Tracked Since Feb 18, 2026