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CVE-2021-3765

Inefficient Regular Expression Complexity in validatorjs/validator.js

5.3 MediumFix available

validator.js is vulnerable to Inefficient Regular Expression Complexity

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

1.79%Up 1.2 points since Nov 2, 2021
90%50%10%1%

What each source reports

CVE List Score used 5.3

Inefficient Regular Expression Complexity in validatorjs/validator.js

validator.js is vulnerable to Inefficient Regular Expression Complexity

Record
CVE-2021-3765
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-1333
Updated
2026-11-02
EUVDEUVD-2021-2382 5.3

validator.js is vulnerable to Inefficient Regular Expression Complexity

Record
EUVD-2021-2382
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-03
GitHub AdvisoriesGHSA-qgmg-gppg-76g5 5.3

Inefficient Regular Expression Complexity in validator.js

validator.js prior to 13.7.0 is vulnerable to Inefficient Regular Expression Complexity

Record
GHSA-qgmg-gppg-76g5
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-1333
Updated
2026-11-02
NVD 7.5

validator.js is vulnerable to Inefficient Regular Expression Complexity

Record
CVE-2021-3765
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-1333
Updated
2026-11-02
OSV 7.5

validator.js is vulnerable to Inefficient Regular Expression Complexity

Record
CVE-2021-3765
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGHSA-qgmg-gppg-76g5 5.3

Inefficient Regular Expression Complexity in validator.js

validator.js prior to 13.7.0 is vulnerable to Inefficient Regular Expression Complexity

Record
GHSA-qgmg-gppg-76g5
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness
CWE-1333
Updated
2026-11-02
Show 5 moreShow less
OSVUBUNTU-CVE-2021-3765 7.5

validator.js is vulnerable to Inefficient Regular Expression Complexity

Record
UBUNTU-CVE-2021-3765
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSVCLSA-2026-1777163882 No score

TuxCare security update for validator (2 CVEs)

TuxCare rebuilt validator to address 2 CVEs. Fixed in 10.11.0-tuxcare.3.

Record
CLSA-2026-1777163882
Updated
2026-11-02
OSVCLSA-2026-1789162879 No score

TuxCare security update for validator (1 CVE)

TuxCare rebuilt validator to address 1 CVE. Fixed in 4.4.0-tuxcare.2.

Record
CLSA-2026-1789162879
Updated
2026-11-02
OSVCLSA-2026-1790176084 No score

TuxCare security update for validator (1 CVE)

TuxCare rebuilt validator to address 1 CVE. Fixed in 7.2.0-tuxcare.2.

Record
CLSA-2026-1790176084
Updated
2026-11-02
OSVROOT-APP-NPM-CVE-2021-3765 No score

CVE-2021-3765 in validator - Patched by Root

Root has patched CVE-2021-3765 in the validator package for Root:npm. Multiple fixed versions available.

Record
ROOT-APP-NPM-CVE-2021-3765
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
validator
npm
 before 13.7.0
13.7.0
validator
TuxCare:npm
From an advisory covering 2 CVEs
 10.11.0-tuxcare.0 up to 10.11.0-tuxcare.3, plus listed versions
10.11.010.11.0-tuxcare.110.11.0-tuxcare.2
10.11.0-tuxcare.3
validator
TuxCare:npm
 4.4.0-tuxcare.0 up to 4.4.0-tuxcare.2, plus listed versions
4.4.04.4.0-tuxcare.1
4.4.0-tuxcare.2
validator
TuxCare:npm
 7.2.0-tuxcare.0 up to 7.2.0-tuxcare.2, plus listed versions
7.2.07.2.0-tuxcare.1
7.2.0-tuxcare.2
validator
Root:npm
 before 13.7.0-aikido.1
13.7.0-aikido.1
@rootio/validator
Root:npm
 before 13.7.0-root.io.1
13.7.0-root.io.1
validator.js
Ubuntu:16.04:LTS
 All versions, plus listed versions
3.17.0+dfsg1-14.7.1+dfsg1-1
 None known
validator.js
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.7.1+dfsg1-1.1
 None known

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-3765 is a medium vulnerability (CVSS 5.3) in Validator Project Validator, published November 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.79%, the 78th percentile. Fixed in validator 13.7.0.

References

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