8.5
CVE-2025-71408
- EPSS 0.18%
- Veröffentlicht 24.07.2026 21:07:49
- Zuletzt bearbeitet 08.10.2026 16:16:53
- Erkennungen
LoginNLTK < 3.9.3 Eval Injection via collocations.py Command-Line Arguments
NLTK (Natural Language Toolkit) before version 3.9.3 contains an eval injection vulnerability in the nltk.collocations module that allows an attacker who controls command-line arguments to execute arbitrary Python code. When collocations.py is invoked directly, the __main__ block passes command-line arguments directly to eval() as suffixes of BigramAssocMeasures without allowlist validation or sanitization, enabling an attacker to supply a Python expression that escapes the intended attribute lookup and executes arbitrary code including OS commands via the os module.
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.18% | 0.082 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| disclosure@vulncheck.com | 8.5 | 0 | 0 |
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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
|
| disclosure@vulncheck.com | 7.8 | 1.8 | 5.9 |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
|
CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes code syntax before using the input in a dynamic evaluation call (e.g. "eval").
https://aydinnyunus.github.io/2026/06/07/command-injection-nltk-collocations-eval/
https://github.com/nltk/nltk/releases/tag/3.9.3
https://github.com/nltk/nltk/pull/3465
https://github.com/nltk/nltk/commit/66f14096d952ec8f04934f515e027534bd4eb0ac
https://www.vulncheck.com/advisories/nltk-eval-injection-via-collocations-py-command-line-arguments