CVE-2021-3794: vuelidate is vulnerable to Inefficient Regular Expression Complexity

Q: How do I fix CVE-2021-3794?

vuelidate: upgrade to 0.7.7; vuelidate: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2021-3794 being exploited?

CVE-2021-3794 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-3794 affect?

CVE-2021-3794 affects vuelidate, vuelidate. Severity is high (CVSS 7.5). vuelidate is vulnerable to Inefficient Regular Expression Complexity

Q: How urgent is CVE-2021-3794?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADEDOWNGRADE

CVE-2021-3794 is a high-severity flaw (CVSS 7.5) affecting vuelidate, vuelidate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

vuelidate is vulnerable to Inefficient Regular Expression Complexity

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-1333
Published	2021-09-15
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: vuelidate project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-09-15 13:15 UTCPublished CVE record published
2026-06-17 04:05 UTCUpdated Record last modified

vuelidate project vuelidate UPGRADE

Affected: < 0.7.7

Fixed in: 0.7.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy vuelidate || rpm -q vuelidate || vuelidate --version

2. UPGRADE to 0.7.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vuelidate

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vuelidate

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

vuelidate project vuelidate DOWNGRADE

Affected: 1.0.0 alpha1 · 1.0.0 alpha2 · 2.0.0 alpha0 · 2.0.0 alpha1 · 2.0.0 alpha10 · 2.0.0 alpha11 · 2.0.0 alpha12 · 2.0.0 alpha13

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

npm ls vuelidate

2. No fixed release: DOWNGRADE to a release before 1.0.0

npm view vuelidate versions npm install vuelidate@"<1.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-3794?

vuelidate: upgrade to 0.7.7; vuelidate: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-3794 being exploited?

CVE-2021-3794 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-3794 affect?

CVE-2021-3794 affects vuelidate, vuelidate. Severity is high (CVSS 7.5). vuelidate is vulnerable to Inefficient Regular Expression Complexity

How urgent is CVE-2021-3794?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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