AZL-99696
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-99696.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-99696
- Upstream
- Published
- 2026-09-01T19:17:30Z
- Modified
- 2026-09-06T05:31:44Z
- Summary
- CVE-2026-84303 affecting package grpc 1.62.3-1
- Details
-
gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, the xDS RBAC HTTP filter in internal/xds/httpfilter/rbac/rbac.go does not lowercase header matcher names in normalizeHeaderMatcher even though incoming metadata keys are lowercase. A DENY policy using a mixed-case name such as X-Role or User-Agent therefore does not match and fails open, allowing requests that should be rejected. The same case mismatch permits :Scheme or Grpc-Status to evade gRFC A41 validation and prevents Host from being rewritten to :authority. This issue is fixed in version 1.83.1.
- References