Which versions of Mongoose are affected by CVE-2026-2967?

CVE-2026-2967 is a low-severity vulnerability in Cesanta Mongoose (CVSS 3.7). The limited severity suggests constrained impact, typically requiring specific conditions or local access for…

Is there a public PoC exploit available for CVE-2026-2967?

Yes, a public proof-of-concept exploit is available for CVE-2026-2967. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-2967?

During next maintenance window: Apply vendor patches when convenient. Monitor vendor channels for updates.

Mongoose CVE-2026-2967

Q: What is the CVSS score of CVE-2026-2967?

CVE-2026-2967 has a CVSS 4.0 base score of 2.9 (Low). CVSS vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

LOW

Improper Verification of Source of a Communication Channel (CWE-940)

2026-02-23 cna@vuldb.com

Information Disclosure Mongoose

2.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.9 LOW

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

3.7 (LOW) 2.9 (LOW)

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Feb 23, 2026 - 20:17 vuln.today

Public exploit code

CVE Published

Feb 23, 2026 - 04:16 nvd

LOW 3.7

DescriptionCVE.org

A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 3.7 (LOW). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	A remote attacker could exploit this flaw, improper verification of source of a communication channel.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

During next maintenance window: Apply vendor patches when convenient. …

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CVE-2026-2967 vulnerability details – vuln.today

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