CVE-2021-3828
low
CVSS v3
—
CVSS v4 NEW
—
VIR risk
2.5
Description
nltk is vulnerable to Inefficient Regular Expression Complexity
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 3.6.5-1 |
| sid | Fixed | 3.6.5-1 |
| forky | Fixed | 3.6.5-1 |
| bullseye | Affected | — |
| bookworm | Fixed | 3.6.5-1 |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 3.6.4-1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-3828
- https://github.com/nltk/nltk/pull/2816
- https://github.com/nltk/nltk/commit/277711ab1dec729e626b27aab6fa35ea5efbd7e6
- https://github.com/advisories/GHSA-2ww3-fxvq-293j
- https://github.com/nltk/nltk
- https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2021-356.yaml
- https://huntr.dev/bounties/d19aed43-75bc-4a03-91a0-4d0bb516bc32
- https://security-tracker.debian.org/tracker/CVE-2021-3828
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.