CVE-2026-65915

Description

NLTK versions before 3.10.0 contain a logic bug in FileSystemPathPointer.open() where the sandbox validation check compares a normalized path against itself, making the security check permanently inert. Attackers can pass file:// URLs to nltk.data.load() to read arbitrary files accessible to the process user, including credentials and configuration files.

CVSS Vector

References

• https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9
• https://www.vulncheck.com/advisories/nltk-before-arbitrary-file-read-via-filesystempathpointer