CVE catalog
CVE-2026-73251
DEBIAN-CVE-2026-73251
- Severity
- High · CVSS 7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.19% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | mongoose | 14 | 7.21+ds-1 | vulnerable |
| Debian | mongoose | 14 | 7.21+ds-1~bpo13+1 | vulnerable |
| Debian | mongoose | 14 | 7.21+ds-2 | vulnerable |
| Debian | mongoose | 14 | 7.22+ds-1 | vulnerable |
| Debian | mongoose | 14 | 7.22+ds-1~bpo13+1 | vulnerable |
| Debian | mongoose | 14 | 7.23+ds-1~bpo13+1 | vulnerable |
| Debian | mongoose | 14 | 7.23+ds-1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | mongoose | deb | 14 | 7.23+ds-1 | Not reported | DEBIAN-CVE-2026-73251 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: