CVE-2026-34874
7.5
HIGH
CVSS 3.1
EPSS 0.08%
Description
An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.
How to fix CVE-2026-34874
No fixed version has been published yet. Mitigate by removing the affected package or applying upstream guidance from the references below.
- Debian/mbedtls—no fix listed
Is CVE-2026-34874 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |