CVE-2021-3828
NLTK Vulnerable to REDoS
7.5
HIGH
CVSS 3.1
EPSS 0.43%
Description
nltk is vulnerable to Inefficient Regular Expression Complexity
How to fix CVE-2021-3828
To remediate CVE-2021-3828, upgrade the affected package to a fixed version below.
- Debian/nltk—no fix listed
- PyPI/nltk—upgrade to 3.6.4 or later
- PyPI/nltk—upgrade to 277711ab1dec729e626b27aab6fa35ea5efbd7e6 or later
Is CVE-2021-3828 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0
- from 0, < 3.6.4
- from 0, < 277711ab1dec729e626b27aab6fa35ea5efbd7e6 | from 0, < 3.6.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |