CVE-2026-65915CWE-284broken-access-control

CVE-2026-65915

Medium · published August 22, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
34.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00410 · 34.1th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-08-22T19:16Z
Affected products (1)
ProductVersionsFixed in
nltk/nltk< 3.10.03.10.0
References (3)
https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9 · [email protected]https://www.vulncheck.com/advisories/nltk-before-arbitrary-file-read-via-filesystempathpointer · [email protected]https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 22 AUG 14:12Z
    NLTK before 3.10.0 Arbitrary File Read via FileSystemPathPointer
    cvelistv5