PT-2026-80165 · Pypi · Nltk
CVE-2026-12876
·
Published
2026-08-14
·
Updated
2026-09-10
CVSS v4.0
6.9
Medium
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
Name of the Vulnerable Software and Affected Versions
NLTK (affected versions not specified)
Description
The
nltk.parse.RecursiveDescentParser and SteppingRecursiveDescentParser functions enumerate parses top-down without a limit on recursive steps. A specially crafted context-free grammar can cause a short input to consume unbounded CPU resources or exhaust the Python recursion stack, leading to a denial of service by pinning the process indefinitely.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Uncontrolled Recursion
Found an issue in the description? Have something to add? Feel free to write us 👾
Related Identifiers
Affected Products
Nltk