CVE-2026-73251

Katalog CVE

CVSS 9.1 · Critical EPSS 0,19%

Kerentanan Improper Certificate Validation pada cesanta mongoose. Skor CVSS 3.1 9.1 (Critical) menurut NVD.

Deskripsi (NVD)

Mongoose is an embedded web server and network library. Prior to 7.23, a network attacker can impersonate a TLS server to a Mongoose client configured with a multi-certificate CA bundle. In src/tls_builtin.c, the mg_tls_init() function stores the bundle in tls->ca_bundle_der while tls->ca_der.len remains zero, and mg_tls_recv_cert() uses tls_bundle_find() to accept a Common Name match without calling mg_tls_verify_cert_signature(). A forged self-signed certificate can therefore satisfy hostname and CertificateVerify checks and enable interception, credential disclosure, traffic modification, and malicious responses. This issue is fixed in version 7.23.

Rincian

Terbit di NVD

20 Agustus 2026

Terakhir diubah

29 September 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-295: Improper Certificate Validation

EPSS (30 hari)

0,19% peluang dieksploitasi; lebih tinggi dari 8,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/cesanta/mongoose/security/advisories/GHSA-qj6j-2692-v2r8 advisory vendor
• https://github.com/cesanta/mongoose/commit/2988bc9df3a5efc9539471cb7455975fa25df483 patch
• https://github.com/cesanta/mongoose/releases/tag/7.23 release notes