Description (CNA)
In nltk version 3.9.4, the `nltk.downloader.Downloader._download_package()` function writes downloaded package bytes to disk and may extract them before enforcing SHA-256 or MD5 checksum validation. This allows an attacker to tamper with the package response body for `info.url` through a compromised mirror, malicious proxy, or other source-substitution condition, leading to the installation of attacker-controlled package bytes. The vulnerability can result in malicious corpus or model content being trusted by downstream users or applications.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| nltk / nltk/nltk | affected unspecified through latest |
CWE
CWE-494
References
ADP enrichment
No English description supplied.
No references supplied.