CVE-2026-40394

Katalog CVE

CVSS 7.5 · High EPSS 0,40%

Kerentanan Always-Incorrect Control Flow Implementation pada varnish-software varnish enterprise, vinyl-cache vinyl cache. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

Varnish Cache 9 before 9.0.1 and Varnish Enterprise before 6.0.16r11 allows a "workspace overflow" denial of service (daemon panic) for certain amounts of prefetched data. The setup of an HTTP/2 session starts with a speculative HTTP/1 transport, and upon upgrading to h2 the HTTP/1 request is repurposed as stream zero. During the upgrade, a buffer allocation is made to reserve space to send frames to the client. This allocation would split the original workspace, and depending on the amount of prefetched data, the next fetch could perform a pipelining operation that would run out of workspace.

Rincian

Terbit di NVD

12 April 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber NVD
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-670: Always-Incorrect Control Flow Implementation

EPSS (30 hari)

0,40% peluang dieksploitasi; lebih tinggi dari 32,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://docs.varnish-software.com/security/VEV00002/ advisory vendor