CVE-2026-73251

CVE-2026-73251 · Mongoose Built-in TLS: CA-bundle certificate chain accepted without any signature verification

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

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.

CVSS 9.3 · Critique · EPSS 0,2% · Correctif disponible

Publication

2026-08-20T17:34:50.472Z

Mise à jour

2026-08-20T19:50:32.555Z

Pile logicielle: system

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