CVE-2026-77069

Katalog CVE

CVSS 4.3 · Medium EPSS 0,29%

Kerentanan Server-Side Request Forgery (SSRF) pada n8n. Skor CVSS 3.1 4.3 (Medium) menurut NVD.

Deskripsi (NVD)

n8n before 1.123.69, 2.33.4, and 2.34.1 contains an SSRF protection bypass in the OAuth2 credential authorization-code-to-access-token exchange. While OAuth2 discovery and dynamic-client-registration requests use n8n's SSRF-protected HTTP client, the token exchange uses a separate client with no SSRF guard. A user with credential-creation permissions can set the access-token URL to an internal address and complete the OAuth2 flow, causing n8n to send a fixed-shape token-exchange POST to that target and reflect its response body back to the attacker (limited to what the target returns to this specific request).

Rincian

Terbit di NVD

20 Agustus 2026

Terakhir diubah

1 September 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-918: Server-Side Request Forgery (SSRF)

EPSS (30 hari)

0,29% peluang dieksploitasi; lebih tinggi dari 20,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/n8n-io/n8n/security/advisories/GHSA-c4f6-59xq-95ww mitigasi · advisory vendor
• https://www.vulncheck.com/advisories/n8n-before-ssrf-protection-bypass-via-oauth2 advisory pihak ketiga