CVE-2020-8595
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.
Does this matter?
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.
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.
- CVSS 3.1
- 7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 2.61% probability · 85th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- istio/istio · redhat/openshift service mesh
- Source
- cve@mitre.org
EPSS 2.6% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.