CVE-2020-8843

HighCVSS 7.4/10Last modified Jun 17, 2026

Description

An issue was discovered in Istio 1.3 through 1.3.6. Under certain circumstances, it is possible to bypass a specifically configured Mixer policy. Istio-proxy accepts the x-istio-attributes header at ingress that can be used to affect policy decisions when Mixer policy selectively applies to a source equal to ingress. To exploit this vulnerability, someone has to encode a source.uid in this header. This feature is disabled by default in Istio 1.3 and 1.4.

Metrics

CVSS 3.1 7.4/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-20

Affected software

No affected versions have been published.

Timeline

Published
Feb 14, 2020
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2020-8843: High severity, CVSS 7.4 | Vulnix