Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a vulnerability in Envoy RBAC header matching could allow authorization policy bypass when policies rely on HTTP headers that may contain multiple values. An attacker could craft requests with multiple header values in a way that causes Envoy to evaluate the header differently than intended, potentially bypassing authorization checks. This may allow unauthorized requests to reach protected services when policies depend on such header-based matching conditions. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8.
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History
Wed, 11 Mar 2026 14:15:00 +0000
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ssvc
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Wed, 11 Mar 2026 12:00:00 +0000
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Istio
Istio istio |
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Istio
Istio istio |
Tue, 10 Mar 2026 22:15:00 +0000
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| Description | Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a vulnerability in Envoy RBAC header matching could allow authorization policy bypass when policies rely on HTTP headers that may contain multiple values. An attacker could craft requests with multiple header values in a way that causes Envoy to evaluate the header differently than intended, potentially bypassing authorization checks. This may allow unauthorized requests to reach protected services when policies depend on such header-based matching conditions. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8. | |
| Title | Istio HTTP debug endpoints on port 15014 to enforce namespace-based authorization, preventing cross-namespace proxy data access. | |
| Weaknesses | CWE-863 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-10T21:58:53.354Z
Updated: 2026-03-11T13:53:28.620Z
Reserved: 2026-03-09T17:41:56.078Z
Link: CVE-2026-31838
Updated: 2026-03-11T13:53:25.008Z
Status : Awaiting Analysis
Published: 2026-03-10T22:16:21.870
Modified: 2026-03-11T13:52:47.683
Link: CVE-2026-31838
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