Vulnerability Description
A vulnerability was determined in Cesanta Mongoose up to 7.20. Affected is the function mg_tls_verify_cert_signature of the file mongoose.c of the component P-384 Public Key Handler. Executing a manipulation can lead to authorization bypass. The attack can be executed remotely. Attacks of this nature are highly complex. The exploitability is told to be difficult. The exploit has been publicly disclosed and may be utilized. Upgrading to version 7.21 is able to address this issue. This patch is called 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cesanta | Mongoose | >= 7.0, < 7.21 |
Related Weaknesses (CWE)
References
- https://github.com/cesanta/mongoose/Product
- https://github.com/cesanta/mongoose/commit/0d882f1b43ff2308b7486a56a9d60cd6dba8aPatch
- https://github.com/cesanta/mongoose/releases/tag/7.21ProductRelease Notes
- https://vuldb.com/submit/770104Third Party AdvisoryVDB Entry
- https://vuldb.com/vuln/354827Third Party AdvisoryVDB Entry
- https://vuldb.com/vuln/354827/ctiPermissions RequiredVDB Entry
FAQ
What is CVE-2026-5246?
CVE-2026-5246 is a vulnerability with a CVSS score of 5.6 (MEDIUM). A vulnerability was determined in Cesanta Mongoose up to 7.20. Affected is the function mg_tls_verify_cert_signature of the file mongoose.c of the component P-384 Public Key Handler. Executing a manip...
How severe is CVE-2026-5246?
CVE-2026-5246 has been rated MEDIUM with a CVSS base score of 5.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-5246?
Check the references section above for vendor advisories and patch information. Affected products include: Cesanta Mongoose.