CVE-2020-8595

Name: CVE-2020-8595
Creator: NVD / NIST
Published: 2020-02-12T15:15:14.727+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.3/10EPSS 2.61%

Last modified Jun 17, 2026

CVE-2020-8595 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. EPSS estimates a 2.61% chance of exploitation in the next 30 days.

Description

Istio versions 1.2.10 (End of Life) and prior, 1.3 through 1.3.7, and 1.4 through 1.4.3 allows authentication bypass. The Authentication Policy exact-path matching logic can allow unauthorized access to HTTP paths even if they are configured to be only accessed after presenting a valid JWT token. For example, an attacker can add a ? or # character to a URI that would otherwise satisfy an exact-path match.

Metrics

CVSS 3.1

7.3/10

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

EPSS Probability

2.61%

83.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Istio	Istio	>= 1.3, <= 1.3.7
Istio	Istio	>= 1.4.0, <= 1.4.3
Redhat	Openshift Service Mesh	1.0

References

https://access.redhat.com/errata/RHSA-2020:0477Third Party Advisory
https://access.redhat.com/security/cve/cve-2020-8595Mitigation, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595Issue Tracking, Mitigation, Third Party Advisory
https://github.com/istio/istio/commits/masterPatch
https://istio.io/news/security/Vendor Advisory
https://istio.io/news/security/istio-security-2020-001/Patch, Vendor Advisory
https://access.redhat.com/errata/RHSA-2020:0477Third Party Advisory
https://access.redhat.com/security/cve/cve-2020-8595Mitigation, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595Issue Tracking, Mitigation, Third Party Advisory
https://github.com/istio/istio/commits/masterPatch
https://istio.io/news/security/Vendor Advisory
https://istio.io/news/security/istio-security-2020-001/Patch, Vendor Advisory

Timeline

Published: Feb 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8595?

How severe is CVE-2020-8595?

CVE-2020-8595 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 2.61% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8595?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8595?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST