DEBIAN-CVE-2026-80206
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-80206
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-80206.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-80206
- Upstream
- Published
- 2026-08-26T11:16:40Z
- Modified
- 2026-09-14T17:03:56Z
- Severity
-
- 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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 3.10.3 contains a regular expression denial of service (ReDoS) vulnerability in the tgrep module. The _tgrep_node_action function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels without any validation or timeout. An attacker who controls the tgrep pattern (e.g., via tgrep_positions() or tgrep_compile() exposed to external input) can supply a pattern that triggers catastrophic backtracking, causing indefinite CPU saturation that blocks the Python process.
- 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