How severe is CVE-2020-17479?

CVE-2020-17479 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-17479 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-17479?

CVE-2020-17479 affects Json Pattern Validator Project Json Pattern Validator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-17479?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-17479 published?

CVE-2020-17479 was published on 2020-08-10 and last updated on 2026-06-17.

CVE-2020-17479

CVE-2020-17479 is a critical-severity vulnerability in Json Pattern Validator Project Json Pattern Validator with a CVSS 3.x base score of 9.8. 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Json Pattern Validator Project Json Pattern Validator
Published: 2020-08-10
Last modified: 2026-06-17

Description

jpv (aka Json Pattern Validator) before 2.2.2 does not properly validate input, as demonstrated by a corrupted array.

Frequently asked questions

What is CVE-2020-17479?: jpv (aka Json Pattern Validator) before 2.2.2 does not properly validate input, as demonstrated by a corrupted array.
How severe is CVE-2020-17479?: CVE-2020-17479 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-17479 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-17479?: CVE-2020-17479 affects Json Pattern Validator Project Json Pattern Validator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-17479?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-17479 published?: CVE-2020-17479 was published on 2020-08-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:json_pattern_validator_project:json_pattern_validator:*:*:*:*:*:node.js:*:*

More vulnerabilities in Json Pattern Validator Project Json Pattern Validator

CVE-2019-19507 — Medium (CVSS 5.3): In jpv (aka Json Pattern Validator) before 2.1.1, compareCommon() can be bypassed because certain internal attributes…

All CVEs affecting Json Pattern Validator Project Json Pattern Validator →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →