Technology · Cesanta
Cesanta Mongoose vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 11 vulnerabilities in Cesanta Mongoose: 0 in the last 7 days and 6 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-115473, was published on 4 November 2026. 5 vulnerabilities in the last four weeks, up 400% on the four before (1).
- Last 7 days
- 0
- Last 90 days
- 6
- Critical, all time
- 0
- Exploited in the wild
- 0
About Cesanta Mongoose
Lightweight embedded web server library for building networked applications.
Latest Cesanta Mongoose vulnerabilities
- CVE-2026-115473: Mongoose heap out-of-bounds read in path validationmediumCVSS 6.5
- CVE-2026-73261: Mongoose TCP option parser bounds check vulnerabilityhighCVSS 7.5EPSS 0.4%
- CVE-2026-73260: Mongoose TLS certificate parser bounds check in DER parsinghighCVSS 7.5EPSS 0.2%
- CVE-2026-73252: Mongoose TLS short-record out-of-bounds readhighCVSS 7.5EPSS 0.4%
- CVE-2026-63626: Mongoose IPv6CP length field bounds check buffer overflowhighCVSS 8.8EPSS 0.2%
- CVE-2026-101003: Cesanta Mongoose stack-based buffer overflow in MQTT brokermediumCVSS 5.3
- CVE-2026-6986: A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This issue affects the function…lowCVSS 3.7EPSS 0.2%
- CVE-2026-6985: A weakness has been identified in Cesanta Mongoose up to 7.20. This vulnerability affects the function handle_opt of…mediumCVSS 5.3EPSS 0.6%
- CVE-2026-5246: A vulnerability was determined in Cesanta Mongoose up to 7.20. Affected is the function mg_tls_verify_cert_signature…mediumCVSS 5.6EPSS 0.6%
- CVE-2026-5245: A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handle_mdns_record of the file…mediumCVSS 5.6EPSS 0.7%
- CVE-2026-5244: A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file…highCVSS 7.3EPSS 0.7%
Most severe Cesanta Mongoose vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-63626: Mongoose IPv6CP length field bounds check buffer overflowhighCVSS 8.8EPSS 0.2%
- CVE-2026-73252: Mongoose TLS short-record out-of-bounds readhighCVSS 7.5EPSS 0.4%
- CVE-2026-73261: Mongoose TCP option parser bounds check vulnerabilityhighCVSS 7.5EPSS 0.4%
- CVE-2026-73260: Mongoose TLS certificate parser bounds check in DER parsinghighCVSS 7.5EPSS 0.2%
- CVE-2026-5244: A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file…highCVSS 7.3EPSS 0.7%
- CVE-2026-115473: Mongoose heap out-of-bounds read in path validationmediumCVSS 6.5
- CVE-2026-5245: A vulnerability was found in Cesanta Mongoose up to 7.20. This impacts the function handle_mdns_record of the file…mediumCVSS 5.6EPSS 0.7%
- CVE-2026-5246: A vulnerability was determined in Cesanta Mongoose up to 7.20. Affected is the function mg_tls_verify_cert_signature…mediumCVSS 5.6EPSS 0.6%
- CVE-2026-6985: A weakness has been identified in Cesanta Mongoose up to 7.20. This vulnerability affects the function handle_opt of…mediumCVSS 5.3EPSS 0.6%
- CVE-2026-101003: Cesanta Mongoose stack-based buffer overflow in MQTT brokermediumCVSS 5.3
Vulnerabilities per week
5 vulnerabilities in the last four weeks, up 400% on the four before (1). The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 1 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 4 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 1 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Cesanta Mongoose vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/cesanta-mongoose)<a href="https://junglewise.ai/threats/technologies/cesanta-mongoose"><img src="https://junglewise.ai/threats/technologies/cesanta-mongoose/badge.svg" alt="Cesanta Mongoose vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/cesanta-mongoose.json, and this page as text at https://junglewise.ai/threats/technologies/cesanta-mongoose.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Cesanta Mongoose vulnerabilities", https://junglewise.ai/threats/technologies/cesanta-mongoose, 12 November 2026.