BIT-envoy-2026-26308
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/envoy/BIT-envoy-2026-26308.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/BIT-envoy-2026-26308
- Aliases
- Published
- 2026-03-12T08:39:41.078Z
- Modified
- 2026-03-12T09:26:20.786641Z
- Summary
- Envoy has an RBAC Header Validation Bypass via Multi-Value Header Concatenation
- Details
-
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, the Envoy RBAC (Role-Based Access Control) filter contains a logic vulnerability in how it validates HTTP headers when multiple values are present for the same header name. Instead of validating each header value individually, Envoy concatenates all values into a single comma-separated string. This behavior allows attackers to bypass RBAC policies—specifically "Deny" rules—by sending duplicate headers, effectively obscuring the malicious value from exact-match mechanisms. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
- Database specific
{ "cpes": [ "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:go:*:*" ], "severity": "High" }- References
Affected packages
Bitnami / envoy
Package
- Name
- envoy
- Purl
- pkg:bitnami/envoy
Severity
- 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N CVSS Calculator