How severe is CVE-2016-2537?

CVE-2016-2537 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-2537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-2537?

CVE-2016-2537 affects Is My Json Valid Project Is My Json Valid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-2537?

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

When was CVE-2016-2537 published?

CVE-2016-2537 was published on 2016-02-23 and last updated on 2026-06-17.

CVE-2016-2537

CVE-2016-2537 is a high-severity vulnerability in Is My Json Valid Project Is My Json Valid with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Is My Json Valid Project Is My Json Valid
Published: 2016-02-23
Last modified: 2026-06-17

Description

The is-my-json-valid package before 2.12.4 for Node.js has an incorrect exports['utc-millisec'] regular expression, which allows remote attackers to cause a denial of service (blocked event loop) via a crafted string.

Frequently asked questions

What is CVE-2016-2537?: The is-my-json-valid package before 2.12.4 for Node.js has an incorrect exports['utc-millisec'] regular expression, which allows remote attackers to cause a denial of service (blocked event loop) via a crafted string.
How severe is CVE-2016-2537?: CVE-2016-2537 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-2537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-2537?: CVE-2016-2537 affects Is My Json Valid Project Is My Json Valid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-2537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-2537 published?: CVE-2016-2537 was published on 2016-02-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:is_my_json_valid_project:is_my_json_valid:*:*:*:*:*:node.js:*:*

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