{"id":"CVE-2020-8595","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-8595","generatedAt":"2026-10-27T22:24:58.941Z","title":"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.","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.","published":"2020-02-12T15:15:15.000Z","lastModified":"2026-06-17T03:26:37.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"cwe":["CWE-287"],"affected":["istio/istio","redhat/openshift service mesh"],"epss":{"score":0.02606,"percentile":0.85278,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (2.61%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2020:0477","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/security/cve/cve-2020-8595","tags":["Mitigation","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595","tags":["Issue Tracking","Mitigation","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/istio/istio/commits/master","tags":["Patch"],"source":"cve@mitre.org"},{"url":"https://istio.io/news/security/","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://istio.io/news/security/istio-security-2020-001/","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://access.redhat.com/errata/RHSA-2020:0477","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/security/cve/cve-2020-8595","tags":["Mitigation","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-8595","tags":["Issue Tracking","Mitigation","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/istio/istio/commits/master","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://istio.io/news/security/","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://istio.io/news/security/istio-security-2020-001/","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-8595","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}