CVE-2021-31920

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Istio before 1.8.6 and 1.9.x before 1.9.5 has a remotely exploitable vulnerability where an HTTP request path with multiple slashes or escaped slash characters (%2F or %5C) could potentially bypass an Istio authorization policy when path based authorization rules are used.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-706

Affected software

No affected versions have been published.

Timeline

Published: May 27, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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