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CVE-2026-5244
HIGH7.3
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.
CVE Details
CVSS v3.1 Score7.3
SeverityHIGH
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published4/2/2026
Last Modified4/3/2026
Sourcenvd
Honeypot Sightings0
Weaknesses (CWE)
CWE-119CWE-122
References
https://github.com/cesanta/mongoose/(cna@vuldb.com)
https://github.com/cesanta/mongoose/releases/tag/7.21(cna@vuldb.com)
https://vuldb.com/submit/770063(cna@vuldb.com)
https://vuldb.com/vuln/354825(cna@vuldb.com)
https://vuldb.com/vuln/354825/cti(cna@vuldb.com)
IOC Correlations
No correlations recorded
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