DEBIAN-CVE-2026-73251

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Source
https://security-tracker.debian.org/tracker/CVE-2026-73251
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73251.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-73251
Upstream
Published
2026-08-20T18:16:45Z
Modified
2026-09-30T09:00:16Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:14 / mongoose

Package

Name
mongoose
Purl
pkg:deb/debian/mongoose?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
7.23+ds-1

Affected versions

7.*
7.21+ds-1~bpo13+1
7.21+ds-1
7.21+ds-2
7.22+ds-1~bpo13+1
7.22+ds-1
7.23+ds-1~bpo13+1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73251.json"