Advisory details:
github_osv / GHSA-848c-c2cx-j7qx
| Advisory ID | github_osv/GHSA-848c-c2cx-j7qx |
| Aliases |
CVE-2025-71408
|
| Summary | NLTK vulnerable to Eval Injection via collocations CLI 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. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 7.7 |
| Risk | 3.9 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 7.8 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-848c-c2cx-j7qx/GHSA-848c-c2cx-j7qx.json |
| cvssv4 | 8.5 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-848c-c2cx-j7qx/GHSA-848c-c2cx-j7qx.json |
| generic_textual | HIGH |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-07-27T17:22:32Z/
Decision: Track*
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2025/71xxx/CVE-2025-71408.json
Source Advisory: vulnrichment/CVE-2025-71408
[{'Exploitation': 'poc'},
{'Automatable': 'no'},
{'Technical Impact': 'total'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]