CVE-2025-27809
5.4
MEDIUM
CVSS 3.1
EPSS 0.14%
Description
Mbed TLS before 2.28.10 and 3.x before 3.6.3, on the client side, accepts servers that have trusted certificates for arbitrary hostnames unless the TLS client application calls mbedtls_ssl_set_hostname.
How to fix CVE-2025-27809
To remediate CVE-2025-27809, upgrade the affected package to a fixed version below.
- Alpine/mbedtls—upgrade to 2.28.10-r0 or later
- Debian/mbedtls—no fix listed
Is CVE-2025-27809 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.28.10-r0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |