CVE-2026-25832: In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts HelloRetryRequest selecting an unadvertised group.

PriorityP415low3.7CVSS 3.1

AVNACHPRNUINSUCNILAN

EPSS

0.22%

12.5th percentile

In Mbed TLS 3.6.x before 3.6.7 and 4.1.x before 4.1.2, the TLS 1.3 client accepts HelloRetryRequest selecting an unadvertised group.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
trustedfirmware	mbed_tls	>= 3.5.0 < 3.6.7	3.6.7
trustedfirmware	mbed_tls	>= 4.0.0 < 4.1.2	4.1.2

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