CVE-2026-2966

LOW 3.7

Cesanta Mongoose DNS Transaction ID dns.c mg_sendnsreq random values

CVSS Score

3.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-330 CWE-310
Vendor	cesanta
Product	mongoose
Published	Feb 23, 2026
Last Updated	Feb 23, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Cesanta / Mongoose

7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.10 7.11 7.12 7.13 7.14 7.15 7.16 7.17 7.18 7.19 7.20

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.347333 vuldb.com: https://vuldb.com/?ctiid.347333 vuldb.com: https://vuldb.com/?submit.755304 github.com: https://github.com/dwBruijn/CVEs/blob/main/Mongoose/mg_sendnsreq.md github.com: https://github.com/dwBruijn/CVEs/blob/main/Mongoose/mg_sendnsreq.md#poc

Credits

🔍 dwbruijn (VulDB User)