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CVE-2026-5244

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CVE-2026-5244

Published: Apr 2, 2026

Modified: Apr 2, 2026

PUBLISHED

CVSS v3.1

7.3

HIGH

Description

A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 7.21 mitigates this issue. The name of the patch is 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

VendorProductVersions

Cesanta

Mongoose

affected
7.0
affected
7.1
affected
7.2
affected
7.3
affected
7.4

+17 more versions

Weaknesses (CWE)

CWE-122
CWE-119

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

References

VDB-354825 | CTI Indicators (IOB, IOC, IOA)
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