CVE-2021-3804
Inefficient Regular Expression Complexity in nervjs/taro
taro 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
- High
Exploit likelihood
What each source reports
CVE List Score used
Inefficient Regular Expression Complexity in nervjs/taro
taro is vulnerable to Inefficient Regular Expression Complexity
- Record
CVE-2021-3804- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1333
- Updated
- 2026-11-02
EUVDEUVD-2021-1970
taro is vulnerable to Inefficient Regular Expression Complexity
- Record
EUVD-2021-1970- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-468q-v4jj-485h
Inefficient Regular Expression Complexity in taro
taro is vulnerable to Inefficient Regular Expression Complexity
- Record
GHSA-468q-v4jj-485h- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1333
- Updated
- 2026-11-02
NVD
taro is vulnerable to Inefficient Regular Expression Complexity
- Record
CVE-2021-3804- 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
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-1333
- Updated
- 2026-11-02
OSV
taro is vulnerable to Inefficient Regular Expression Complexity
- Record
CVE-2021-3804- 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-468q-v4jj-485h
Inefficient Regular Expression Complexity in taro
taro is vulnerable to Inefficient Regular Expression Complexity
- Record
GHSA-468q-v4jj-485h- CVSS 3.0
- 7.5 High
CVSS:3.0/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 |
|---|---|---|
@tarojs/helpernpm |
before 3.3.9 | 3.3.9 |
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-2021-3804 is a high vulnerability (CVSS 7.5) in Nervjs Nervjs/taro, published September 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.26%, the 69th percentile. Fixed in @tarojs/helper 3.3.9.