CVE-2021-39156
8.1 HIGHIstio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforc...
Published: 2021-08-24 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 8.1 HIGH
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- CWE
- CWE-706, CWE-863
Affected products
| Vendor | Product |
|---|---|
| istio | istio |
Description
Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-39156
- [Other]https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r
- [Vendor advisory]https://istio.io/latest/news/security/istio-security-2021-008
- [Other]https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r
- [Vendor advisory]https://istio.io/latest/news/security/istio-security-2021-008
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