Cesanta Mongoose MQTT Broker main.c fn stack-based overflow
A weakness has been identified in Cesanta Mongoose up to 7.21. Affected by this vulnerability is the function fn of the file tutorials/mqtt/mqtt-server/main.c of the component MQTT Broker. Executing a manipulation can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 7.22 addresses this issue. This patch is called a9df523f76f43a38bd53b4232b9cfd4c16869e71. Upgrading the affected component is advised.
CVE-2026-101003
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-101003
Mongoose
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"cpes": [
"cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*"
],
"vendor": "Cesanta",
"modules": [
"MQTT Broker"
],
"product": "Mongoose",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "affected",
"version": "7.1"
},
{
"status": "affected",
"version": "7.2"
},
{
"status": "affected",
"version": "7.3"
},
{
"status": "affected",
"version": "7.4"
},
{
"status": "affected",
"version": "7.5"
},
{
"status": "affected",
"version": "7.6"
},
{
"status": "affected",
"version": "7.7"
},
{
"status": "affected",
"version": "7.8"
},
{
"status": "affected",
"version": "7.9"
},
{
"status": "affected",
"version": "7.10"
},
{
"status": "affected",
"version": "7.11"
},
{
"status": "affected",
"version": "7.12"
},
{
"status": "affected",
"version": "7.13"
},
{
"status": "affected",
"version": "7.14"
},
{
"status": "affected",
"version": "7.15"
},
{
"status": "affected",
"version": "7.16"
},
{
"status": "affected",
"version": "7.17"
},
{
"status": "affected",
"version": "7.18"
},
{
"status": "affected",
"version": "7.19"
},
{
"status": "affected",
"version": "7.20"
},
{
"status": "affected",
"version": "7.21"
},
{
"status": "unaffected",
"version": "7.22"
}
]
}
]- Related CVEs
- CVE-2026-101003
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #5221 · Revision 1
- Added to Heist Feed
- Publisher date