CVE-2026-102408

Katalog CVE

CVSS 4.3 · Medium EPSS 0,34%

Kerentanan Inefficient Regular Expression Complexity pada elasticsearch. Skor CVSS 3.1 4.3 (Medium) menurut elastic.co.

Deskripsi (NVD)

Inefficient Regular Expression Complexity (CWE-1333) in Elasticsearch can lead to denial of service via Regular Expression Exponential Blowup (CAPEC-492). The ES|QL CHUNK function's recursive chunking strategy accepts a list of user-supplied regular expressions used as text-splitting separators, without validating their computational complexity or bounding their execution time. An authenticated user with read access to any text-based index can submit a specially crafted regular expression that triggers catastrophic backtracking, consuming excessive CPU on Elasticsearch worker threads and degrading query throughput for other tenants on the affected node. The cluster does not crash as a result of this issue.

Rincian

Terbit di NVD

6 Oktober 2026

Terakhir diubah

13 Oktober 2026

Status NVD

Analyzed

CVSS 3.1

4.3 (Medium), sumber elastic.co
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-1333: Inefficient Regular Expression Complexity

EPSS (30 hari)

0,34% peluang dieksploitasi; lebih tinggi dari 25,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://discuss.elastic.co/t/elasticsearch-8-19-22-9-4-8-and-9-5-5-security-update-esa-2026-189/390862 advisory vendor