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CVE-2026-2966
NixOS vulnerability analysis and mitigation

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.


SourceNVD

Related NixOS vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-30892HIGH7.8
  • NixOSNixOS
  • crun
NoYesMar 26, 2026
CVE-2026-33223MEDIUM5.4
  • NixOSNixOS
  • nats-fips
NoYesMar 25, 2026
CVE-2026-33222MEDIUM4.9
  • NixOSNixOS
  • nats-fips
NoYesMar 25, 2026
CVE-2026-33249MEDIUM4.3
  • NixOSNixOS
  • k3s-1.32
NoYesMar 25, 2026
CVE-2026-33248MEDIUM4.2
  • NixOSNixOS
  • github.com/nats-io/nats-server/v2
NoYesMar 25, 2026

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