CVE-2026-73253
CVE-2026-73253 · Mongoose: TLS Hostname Verification Bypass via Overly Permissive Wildcard Matching
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 version 7.22, an on-path network attacker with a wildcard certificate for a parent domain can impersonate deeper subdomains to a client using the built-in TLS stack. The mg_tls_verify_cert_san() and mg_tls_verify_cert_cn() functions in src/tls_builtin.c call mg_match(), whose wildcard can cross DNS label boundaries, so a pattern such as *.example.com can match foo.bar.example.com. The resulting hostname verification bypass permits interception and modification of TLS traffic. This issue is fixed in version 7.22.
CVSS 9.1 · Critique · EPSS 0,3% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: system
Produits et versions concernés
mongoose
- Versions du logiciel
- < 7.22: Concernée
Aucun correctif publié
mongoose Debian:14
- Versions du logiciel
- 7.21+ds-1
- 7.21+ds-1~bpo13+1
- 7.21+ds-2
- 7.22+ds-1~bpo13+1
- Plages de versions concernées
- ECOSYSTEM: < 7.22+ds-1
Mettez à jour vers 7.22+ds-1
mongoose Ubuntu:26.10
- Versions du logiciel
- 7.21+ds-1
- 7.21+ds-2
- 7.22+ds-1
- 7.23+ds-1
- Plages de versions concernées
- ECOSYSTEM: (−∞, +∞)
Aucun correctif publié
Sources originales
- https://github.com/cesanta/mongoose/security/advisories/GHSA-jp6g-796f-39vp
- https://github.com/cesanta/mongoose/pull/3611
- https://github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9cfd4c16869e71
- https://github.com/cesanta/mongoose/releases/tag/7.22
- https://nvd.nist.gov/vuln/detail/CVE-2026-73253