What is CVE-2019-12243?

CVE-2019-12243 is a high-severity vulnerability in Istio. CVSS score: 7.5/10. Published 2019-06-05.

How severe is CVE-2019-12243?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Istio

CVE-2019-12243

Istio 1.1.x through 1.1.6 has Incorrect Access Control.

Published 2019-06-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.4th percentile), scored 2026-10-25.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Istio

References

istio.io/about/notes/ (Release Notes, Vendor Advisory)
istio.io/blog/2019/cve-2019-12243/ (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2019-12243?: CVE-2019-12243 is a high-severity vulnerability in Istio. CVSS score: 7.5/10. Published 2019-06-05.
How severe is CVE-2019-12243?: High severity. CVSS v3 base score is 7.5 out of 10.