CVE catalog
CVE-2026-81726
NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write
- Severity
- High · CVSS 8.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.34% · Oct 25, 2026
NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write files outside allowed sandbox roots through TransitionParser, AveragedPerceptron, PerceptronTagger, and maxent parameter APIs when pathsec is enabled.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nltk | sid | 3.10.3-1 | vulnerable |
| Debian | nltk | forky | 3.10.3-1 | vulnerable |
| Debian | nltk | trixie | 3.9.1-2 | vulnerable |
| Debian | nltk | bookworm | 3.8-1 | vulnerable |
| Cpe | nltk | Not reported | 3.10.3 | fixed |
| PyPI | nltk | Not reported | 3.10.3 | fixed |
| Pip | nltk | Not reported | Not reported | unknown |
| Opensuse | python-nltk | tumbleweed | 3.10.4-1.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nltk | source | sid | (unfixed) | not yet assigned | Not reported | [1146873] |
| Debian | nltk | source | forky | (unfixed) | not yet assigned | Not reported | [1146873] |
| Debian | nltk | source | trixie | (unfixed) | not yet assigned | Not reported | [1146873] |
| Debian | nltk | source | bookworm | (unfixed) | not yet assigned | Not reported | [1146873] |
| Cpe | nltk | cpe | Not reported | 3.10.3 | Not reported | NVD-CVE-2026-81726 | Not reported |
| PyPI | nltk | PyPI | Not reported | 3.10.3 | Not reported | PYSEC-2026-3740 | Not reported |
| Opensuse | python-nltk | rpm | tumbleweed | 3.10.4-1.1 | Not reported | OPENSUSE-SU-2026:12280-1 | Not reported |
Notes
[trixie] nltk: Minor issue [bookworm] nltk: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-nltk]Affected
Source package: [nltk]
Details (2)
3.8-1· all · bookwormAffected
nvd · nltk · debian · bookworm; nvd · nltk · debian · 12
3.8-1· all · bookwormAffected
nvd · nltk · debian · bookworm; nvd · nltk · debian · 12
[Debian 13 (Trixie)]
- [python3-nltk]Affected
Source package: [nltk]
Details (2)
3.9.1-2· all · trixieAffected
nvd · nltk · debian · 13
3.9.1-2· all · trixieAffected
nvd · nltk · debian · 13
[openSUSE Tumbleweed]
- [python313-nltk]Unknown
Source package: [python-nltk]
Details (1)
3.10.3-1.1· noarch · tumbleweedUnknown · Fixed:
3.10.4-1.1Version impact unknown
nvd · python-nltk · opensuse · tumbleweed
- [python314-nltk]Unknown
Source package: [python-nltk]
Details (1)
3.10.3-1.1· noarch · tumbleweedUnknown · Fixed:
3.10.4-1.1Version impact unknown
nvd · python-nltk · opensuse · tumbleweed
Observed:
References
- [https://github.com/advisories/GHSA-8mgp-746c-j5xp]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-81726]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-81726]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:12280-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-81726]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81726.json]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]