6.9
Medium
CVE-2026-5244 A vulnerability has been found in Cesanta Mongoose up to 7.20
Description
A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 7.21 mitigates this issue. The name of the patch is 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. It is advisable to 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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Mongoose 7.21 | earliest → < 7.21 | 7.21 |
| Mongoose | 7.20 | No fix stated |
| Mongoose | 7.19 | No fix stated |
| Mongoose | 7.18 | No fix stated |
| Mongoose | 7.17 | No fix stated |
| Mongoose | 7.16 | No fix stated |
| Mongoose | 7.15 | No fix stated |
| Mongoose | 7.14 | No fix stated |
| Mongoose | 7.13 | No fix stated |
Show the 13 other branches Hide the 13 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Mongoose | 7.12 | No fix stated |
| Mongoose | 7.11 | No fix stated |
| Mongoose | 7.10 | No fix stated |
| Mongoose | 7.9 | No fix stated |
| Mongoose | 7.8 | No fix stated |
| Mongoose | 7.7 | No fix stated |
| Mongoose | 7.6 | No fix stated |
| Mongoose | 7.5 | No fix stated |
| Mongoose | 7.4 | No fix stated |
| Mongoose | 7.3 | No fix stated |
| Mongoose | 7.2 | No fix stated |
| Mongoose | 7.1 | No fix stated |
| Mongoose | 7.0 | No fix stated |
Other CVEs of Mongoose
The 38 CVEs of Mongoose →
CVE-2026-115473
Mongoose: Heap OOB reads and null-byte bypass in mg_path_is_sane (util.c)
6.5
Medium
CVE-2026-63626
Mongoose is an embedded web server and network library
8.8
High
CVE-2026-73261
Mongoose is an embedded web server and network library
7.5
High
CVE-2026-73260
Mongoose is an embedded web server and network library
7.5
High