CVE-2026-78681

Katalog CVE

CVSS 7.5 · High EPSS 0,52%

Kerentanan Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') pada nltk. Skor CVSS 3.1 7.5 (High) menurut vulncheck.com.

Deskripsi (NVD)

NLTK versions before 3.10.3 use xml.etree.ElementTree to parse XML in multiple modules, which honors entity declarations in document DTDs. Attackers can craft XML payloads with nested entity declarations that expand from hundreds of bytes to megabytes in memory, causing denial of service.

Rincian

Terbit di NVD

25 Agustus 2026

Terakhir diubah

12 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

EPSS (30 hari)

0,52% peluang dieksploitasi; lebih tinggi dari 42,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/nltk/nltk/security/advisories/GHSA-97qj-x29f-37w7 exploit · advisory vendor
• https://www.vulncheck.com/advisories/nltk-before-entity-expansion-dos-via-elementtree advisory pihak ketiga