What is CVE-2019-12995?

CVE-2019-12995 is a high-severity vulnerability in Istio, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-06-28.

How severe is CVE-2019-12995?

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

NULL pointer dereference in Istio

CVE-2019-12995

Istio before 1.2.2 mishandles certain access tokens, leading to "Epoch 0 terminated with an error" in Envoy. This is related to a jwt_authenticator.cc segmentation fault.

Published 2019-06-28 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.022 (81.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Istio

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

istio.io/about/notes/ (Release Notes, Vendor Advisory)
github.com/istio/istio/issues/15084 (Third Party Advisory)
github.com/istio/istio.io/pull/4555 (Third Party Advisory)

Frequently asked questions

What is CVE-2019-12995?: CVE-2019-12995 is a high-severity vulnerability in Istio, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-06-28.
How severe is CVE-2019-12995?: High severity. CVSS v3 base score is 7.5 out of 10.