CVE-2026-26308

Katalog CVE

CVSS 8.2 · High EPSS 0,36%

Kerentanan Incorrect Authorization pada envoyproxy envoy. Skor CVSS 3.1 8.2 (High) menurut NVD.

Deskripsi (NVD)

Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, the Envoy RBAC (Role-Based Access Control) filter contains a logic vulnerability in how it validates HTTP headers when multiple values are present for the same header name. Instead of validating each header value individually, Envoy concatenates all values into a single comma-separated string. This behavior allows attackers to bypass RBAC policies—specifically "Deny" rules—by sending duplicate headers, effectively obscuring the malicious value from exact-match mechanisms. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.

Rincian

Terbit di NVD

10 Maret 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-863: Incorrect Authorization

EPSS (30 hari)

0,36% peluang dieksploitasi; lebih tinggi dari 27,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/envoyproxy/envoy/security/advisories/GHSA-ghc4-35x6-crw5 exploit · mitigasi · advisory vendor
• https://github.com/envoyproxy/envoy/commit/b6ba0b2294b98484fb0ed8556897d1073cc27867 patch