How severe is CVE-2021-3794?

CVE-2021-3794 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-2021-3794 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3794?

CVE-2021-3794 primarily affects Vuelidate Project Vuelidate. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3794?

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-2021-3794 published?

CVE-2021-3794 was published on 2021-09-15 and last updated on 2026-06-17.

CVE-2021-3794

CVE-2021-3794 is a high-severity vulnerability in Vuelidate Project Vuelidate 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-1333.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1333
Affected product: Vuelidate Project Vuelidate
Published: 2021-09-15
Last modified: 2026-06-17

Description

vuelidate is vulnerable to Inefficient Regular Expression Complexity

Frequently asked questions

What is CVE-2021-3794?: vuelidate is vulnerable to Inefficient Regular Expression Complexity
How severe is CVE-2021-3794?: CVE-2021-3794 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-2021-3794 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3794?: CVE-2021-3794 primarily affects Vuelidate Project Vuelidate. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3794?: 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-2021-3794 published?: CVE-2021-3794 was published on 2021-09-15 and last updated on 2026-06-17.

References

Affected products (28)

cpe:2.3:a:vuelidate_project:vuelidate:*:*:*:*:*:*:*:*
cpe:2.3:a:vuelidate_project:vuelidate:1.0.0:alpha1:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:1.0.0:alpha2:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha0:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha1:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha10:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha11:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha12:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha13:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha14:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha15:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha16:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha17:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha18:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha19:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha2:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha20:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha21:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha22:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha23:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha24:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha25:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha3:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha5:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha6:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha7:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha8:*:*:*:node.js:*:*
cpe:2.3:a:vuelidate_project:vuelidate:2.0.0:alpha9:*:*:*:node.js:*:*

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