CVE-2026-80206

Katalog CVE

CVSS 5.9 · Medium EPSS 0,44%

Kerentanan Inefficient Regular Expression Complexity pada nltk. Skor CVSS 3.1 5.9 (Medium) menurut vulncheck.com.

Deskripsi (NVD)

NLTK before 3.10.3 contains a regular expression denial of service (ReDoS) vulnerability in the tgrep module. The _tgrep_node_action function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels without any validation or timeout. An attacker who controls the tgrep pattern (e.g., via tgrep_positions() or tgrep_compile() exposed to external input) can supply a pattern that triggers catastrophic backtracking, causing indefinite CPU saturation that blocks the Python process.

Rincian

Terbit di NVD

26 Agustus 2026

Terakhir diubah

1 September 2026

Status NVD

Analyzed

CVSS 3.1

5.9 (Medium), sumber vulncheck.com
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-1333: Inefficient Regular Expression Complexity

EPSS (30 hari)

0,44% peluang dieksploitasi; lebih tinggi dari 36,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/nltk/nltk/security/advisories/GHSA-w3v8-gmh9-3wv7 exploit · advisory vendor
• https://www.vulncheck.com/advisories/nltk-3.10.2-regular-expression-denial-of-service-via-tgrep advisory pihak ketiga