CVE-2021-3820
Inefficient Regular Expression Complexity in pksunkara/inflect
inflect 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
What each source reports
CVE List Score used
Inefficient Regular Expression Complexity in pksunkara/inflect
inflect is vulnerable to Inefficient Regular Expression Complexity
- Record
CVE-2021-3820- CVSS 3.0
- 5.3 Medium
CVSS: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-2021-2129
inflect is vulnerable to Inefficient Regular Expression Complexity
- Record
EUVD-2021-2129- CVSS 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-x55w-vjjp-222r
inflect vulnerable to Inefficient Regular Expression Complexity
inflect is customizable inflections for nodejs. inflect is vulnerable to Inefficient Regular Expression Complexity
- Record
GHSA-x55w-vjjp-222r- 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 - Weakness
- CWE-1333
- Updated
- 2026-11-02
NVD
inflect is vulnerable to Inefficient Regular Expression Complexity
- Record
CVE-2021-3820- 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 3.0
- 5.3 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - 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
inflect is vulnerable to Inefficient Regular Expression Complexity
- Record
CVE-2021-3820- 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
OSVGHSA-x55w-vjjp-222r
inflect vulnerable to Inefficient Regular Expression Complexity
inflect is customizable inflections for nodejs. inflect is vulnerable to Inefficient Regular Expression Complexity
- Record
GHSA-x55w-vjjp-222r- 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 - Weakness
- CWE-1333
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
inpm | before 0.3.7 | 0.3.7 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-3820 is a medium vulnerability (CVSS 5.3) in Inflect Project Inflect, published September 27, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.22%, the 69th percentile. Fixed in i 0.3.7.