Vulnerability Description
A weakness has been identified in Cesanta Mongoose up to 7.20. The impacted element is the function mg_sendnsreq of the file /src/dns.c of the component DNS Transaction ID Handler. Executing a manipulation of the argument random can lead to insufficiently random values. The attack can be launched remotely. The attack requires a high level of complexity. The exploitability is regarded as difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cesanta | Mongoose | <= 7.20 |
Related Weaknesses (CWE)
References
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/mg_sendnsreq.mdExploitThird Party Advisory
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/mg_sendnsreq.md#pocExploitThird Party Advisory
- https://vuldb.com/?ctiid.347333Permissions RequiredVDB Entry
- https://vuldb.com/?id.347333Third Party AdvisoryVDB Entry
- https://vuldb.com/?submit.755304Third Party AdvisoryVDB Entry
FAQ
What is CVE-2026-2966?
CVE-2026-2966 is a vulnerability with a CVSS score of 3.7 (LOW). A weakness has been identified in Cesanta Mongoose up to 7.20. The impacted element is the function mg_sendnsreq of the file /src/dns.c of the component DNS Transaction ID Handler. Executing a manipul...
How severe is CVE-2026-2966?
CVE-2026-2966 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2966?
Check the references section above for vendor advisories and patch information. Affected products include: Cesanta Mongoose.