CVE-2019-19507
CVE-2019-19507 is a medium-severity vulnerability in Json Pattern Validator Project Json Pattern Validator with a CVSS 3.x base score of 5.3. 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-287.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (58th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-287
- Affected product: Json Pattern Validator Project Json Pattern Validator
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2019-19507?
- 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.
- How severe is CVE-2019-19507?
- CVE-2019-19507 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
- Is CVE-2019-19507 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-19507?
- CVE-2019-19507 affects Json Pattern Validator Project Json Pattern Validator. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-19507?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2019-19507 published?
- CVE-2019-19507 was published on 2019-12-02 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:json_pattern_validator_project:json_pattern_validator:*:*:*:*:*:*:*:*
More vulnerabilities in Json Pattern Validator Project Json Pattern Validator
- CVE-2020-17479 — Critical (CVSS 9.8): jpv (aka Json Pattern Validator) before 2.2.2 does not properly validate input, as demonstrated by a corrupted array.
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