CVE-2026-25834
6.5
MEDIUM
CVSS 3.1
EPSS 0.02%
Description
Mbed TLS v3.3.0 up to 3.6.5 and 4.0.0 allows Algorithm Downgrade.
How to fix CVE-2026-25834
To remediate CVE-2026-25834, upgrade the affected package to a fixed version below.
- Alpine/mbedtls—upgrade to 3.6.6-r0 or later
- Debian/mbedtls—no fix listed
Is CVE-2026-25834 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 3.6.6-r0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |