CVE-2021-3804 json
Inefficient Regular Expression Complexity in nervjs/taro
published 2021-09-17 5 y ago modified 2026-06-17 4 mo ago also GHSA-468q-v4jj-485h , EUVD-2021-1970
- cvss
- 7.5
- version 3.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known
Summary
taro is vulnerable to Inefficient Regular Expression Complexity
Patch / fix
- npm @tarojs/helper 3.3.9
- taro taro 3.3.9
Exploit prediction
1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- huntr.dev https://huntr.dev/bounties/0ebe85e6-cc85-42b8-957e-18d8df277414 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
| GitHub | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @tarojs/helper | <3.3.9 |
3.3.9 |
Affected products
- nervjs nervjs/taro
Classification
- Weakness
-
- CWE-1333 Inefficient Regular Expression Complexity
References
-
github.com
/nervjs/taro/commit/acadb6c826ba57f2030a626f1de4f7b4608fcdb5
web, patch, third-party-advisory
-
huntr.dev
/bounties/0ebe85e6-cc85-42b8-957e-18d8df277414
web, exploit, issue-tracking, patch, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-3804
advisory
-
github.com
/nervjs/taro
package
Sources
- CVE List CVE-2021-3804
- GitHub Advisory GHSA-468q-v4jj-485h
- NVD CVE-2021-3804
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.