CVE-2026-5245

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Source
https://cve.org/CVERecord?id=CVE-2026-5245
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5245.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-5245
Downstream
Published
2026-04-02T09:00:19.688Z
Modified
2026-07-08T08:05:23.144377780Z
Severity
  • 2.9 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
Cesanta Mongoose mDNS Record mongoose.c handle_mdns_record stack-based overflow
Details

A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handlemdnsrecord of the file mongoose.c of the component mDNS Record Handler. Performing a manipulation of the argument buf results in stack-based buffer overflow. Remote exploitation of the attack is possible. A high degree of complexity is needed for the attack. The exploitability is said to be difficult. The exploit has been made public and could be used. Upgrading to version 7.21 will fix this issue. The patch is named 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5245.json",
    "cwe_ids": [
        "CWE-119",
        "CWE-121"
    ],
    "cna_assigner": "VulDB"
}
References

Affected packages

Git / github.com/cesanta/mongoose

Affected ranges

Type
GIT
Repo
https://github.com/cesanta/mongoose
Events
Introduced
54250f5fbfa1972b96ef593b457abd6184ea65a0
Fixed
b1c2ffe1a0aa13e3d94075b1a2c66b8b43ac9116
Fixed
0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1
Database specific 
{
    "cpe": "cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "7.0"
        },
        {
            "fixed": "7.21"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

7.*
7.0
7.1
7.10
7.11
7.12
7.13
7.14
7.15
7.16
7.17
7.18
7.19
7.2
7.20
7.3
7.4
7.5
7.6
7.7
7.8
7.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5245.json"