CVE-2019-12995

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-06-28 · updated 2026-06-17
Weakness: CWE-476

Description

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.

Affected products

istio: before 1.2.2 — fixed in 1.2.2

How to fix

Upgrade to a fixed version: istio 1.2.2. Check the vendor advisory for mitigations.

References

https://github.com/istio/istio.io/pull/4555
https://github.com/istio/istio/issues/15084
https://istio.io/about/notes/
https://github.com/istio/istio.io/pull/4555
https://github.com/istio/istio/issues/15084
https://istio.io/about/notes/

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