CVE-2021-43306
Exponential ReDoS in jquery-validation
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Exponential ReDoS in jquery-validation
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
- Record
CVE-2021-43306- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1333
- Updated
- 2026-11-02
EUVDEUVD-2022-6077
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
- Record
EUVD-2022-6077- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j9m2-h2pv-wvph No score
Regular expression denial of service in jquery-validation
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
- Record
GHSA-j9m2-h2pv-wvph- Weakness
- CWE-1333
- Updated
- 2026-11-02
NVD
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
- Record
CVE-2021-43306- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-1333
- Updated
- 2026-11-02
OSV
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
- Record
CVE-2021-43306- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-43306
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
- Record
UBUNTU-CVE-2021-43306- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVCLSA-2026-1773101704 No score
TuxCare security update for jquery-validation (4 CVEs)
TuxCare rebuilt jquery-validation to address 4 CVEs. Fixed in 1.19.0-tuxcare.1.
- Record
CLSA-2026-1773101704- Updated
- 2026-11-02
OSVGHSA-j9m2-h2pv-wvph No score
Regular expression denial of service in jquery-validation
An exponential ReDoS (Regular Expression Denial of Service) can be triggered in the jquery-validation npm package, when an attacker is able to supply arbitrary input to the url2 method
- Record
GHSA-j9m2-h2pv-wvph- Weakness
- CWE-1333
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
jquery-validationnpm |
before 1.19.4 | 1.19.4 |
jquery-validationTuxCare:npm From an advisory covering 4 CVEs |
1.19.0-tuxcare.0 up to 1.19.0-tuxcare.1, plus listed versions 1.19.0 |
1.19.0-tuxcare.1 |
civicrmUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 4.7.1+dfsg-14.7.1+dfsg-24.7.1+dfsg-2ubuntu14.7.1+dfsg-2ubuntu1+esm1 |
None known |
civicrmUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 4.7.23+dfsg-1ubuntu14.7.24+dfsg-1ubuntu14.7.30+dfsg-1ubuntu14.7.30+dfsg-1ubuntu1+esm1 |
None known |
civicrmUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 5.11.0+dfsg-15.18.1+dfsg-15.20.3+dfsg-15.21.0+dfsg-15.21.1+dfsg-15.21.2+dfsg-15.21.2+dfsg-1ubuntu0.1~esm1 |
None known |
civicrmUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 5.33.2+dfsg1-15.33.2+dfsg1-1build15.33.2+dfsg1-1ubuntu15.33.2+dfsg1-1ubuntu1+esm1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43306 is a medium vulnerability (CVSS 5.9) in Jquery-validation, published June 1, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.52%, the 74th percentile. Fixed in jquery-validation 1.19.4.
References
research.jfrog.com/vulnerabilities/jquery-validation-redos-xray-211348
nvd.nist.gov/vuln/detail/CVE-2021-43306
github.com/jquery-validation/jquery-validation/commit/69cb17ed774b427f7e2ffcdf197968231725c30e
ubuntu.com/security/CVE-2021-43306
cve.org/CVERecord?id=CVE-2021-43306