What’s Vulnerable › Vulnerabilities

CVE-2020-8595

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-12 · updated 2026-06-17
• Weakness: CWE-287

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.

Affected products

• istio: from 1.3 through 1.3.7; from 1.4.0 through 1.4.3
• Red Hat OpenShift Service Mesh 2: 1.0

References

• https://access.redhat.com/errata/RHSA-2020:0477
• https://access.redhat.com/security/cve/cve-2020-8595
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595
• https://github.com/istio/istio/commits/master
• https://istio.io/news/security/
• https://istio.io/news/security/istio-security-2020-001/
• https://access.redhat.com/errata/RHSA-2020:0477
• https://access.redhat.com/security/cve/cve-2020-8595
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595
• https://github.com/istio/istio/commits/master
• https://istio.io/news/security/
• https://istio.io/news/security/istio-security-2020-001/

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