VDB
CVE-2026-81727
CVE-2026-81727
PUBLISHED
CVSS 6.900000095367432 MEDIUM
NLTK: Downloader.download follows hardlinks and overwrites outside-root files
EPSS 0.19% · 8.4th percentile
Risk Scores
CVSS 4.0
6.900000095367432
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.19%
8.4th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| chainguard | open-webui | 0 |
| nltk | nltk | 0, 3.10.3 |
| PyPI | nltk | 0 |
| chainguard | nemo | 0 |
| wolfi | open-webui | 0 |
Timeline
- Aug 27, 2026 Coalition ESS Score
- Aug 27, 2026 CVE Published
- Aug 28, 2026 EPSS Score
- Sep 2, 2026 CVE Updated
- Sep 2, 2026 Security Advisory
- Sep 24, 2026 EPSS Score
- Sep 26, 2026 EPSS Score
- Oct 6, 2026 EPSS Score
- Oct 13, 2026 EPSS Score
- Oct 19, 2026 EPSS Score
- Oct 25, 2026 EPSS Score
- Oct 30, 2026 EPSS Score
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-81727 advisory
- https://github.com/advisories/GHSA-f794-5jv7-7672 advisory
- https://github.com/nltk/nltk/security/advisories/GHSA-f794-5jv7-7672 url
- https://github.com/nltk/nltk/pull/3797 patch
- https://github.com/nltk/nltk/commit/9e6d5f05902b9aaa1221a0a565448d17a9c9b3e8 patch
- https://github.com/nltk/nltk/releases/tag/v3.10.3 url
- https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3741.yaml advisory
- https://www.vulncheck.com/advisories/nltk-before-3.10.3-hardlink-file-overwrite-via-downloader url