DEBIAN-CVE-2026-78683
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-78683
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-78683.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-78683
- Upstream
- Published
- 2026-08-25T02:16:53Z
- Modified
- 2026-09-14T17:03:34Z
- Severity
-
- 9.4 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- [none]
- Details
-
NLTK before 3.10.0 (affected versions <=3.9.4) contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse() method (nltk/parse/transitionparser.py). The method calls pickle_load() with the default restricted=False, routing deserialization through WarningUnpickler, which does not override find_class() and therefore permits arbitrary class resolution. When an application loads an attacker-crafted model file, embedded pickle gadget chains execute arbitrary Python code with the privileges of the user running the application. NLTK provides a RestrictedUnpickler for safe deserialization, but it is not used by production code paths. Fixed in 3.10.0.
- References
Affected packages
Debian:12 / nltk
Package
- Name
- nltk
- Purl
- pkg:deb/debian/nltk?arch=source&distro=bookworm
Debian:13 / nltk
Package
- Name
- nltk
- Purl
- pkg:deb/debian/nltk?arch=source&distro=trixie
Debian:14 / nltk
Package
- Name
- nltk
- Purl
- pkg:deb/debian/nltk?arch=source&distro=forky