Answer in brief
CVE-2026-48599 records a High severity (CVSS 7.6) vulnerability in Authorization bypass via path binding override in elixir-grpc/grpc HTTP transcoding. The current sources do not mark it as known exploited. The current feed maps grpc (erlang), elixir-grpc/elixir-grpc/grpc (generic), elixir-grpc/grpc (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps grpc (erlang), elixir-grpc/elixir-grpc/grpc (generic), elixir-grpc/grpc (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| grpcerlang | >=0.8.0,<1.0.0 | 1.0.0 |
| elixir-grpc/elixir-grpc/grpcgeneric | >=8aaf3d3a8c4c7b08ac65e9c6f254e0d24da1d048 <33b6a095dbc91c6dee3c7b90893d7d74952e82e4 | 33b6a095dbc91c6dee3c7b90893d7d74952e82e4 |
| elixir-grpc/grpcgeneric | >=0.8.0 <1.0.0 | 1.0.0 |
Published upstream
Jun 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 25, 2026
Authorization Bypass Through User-Controlled Key vulnerability in elixir-grpc grpc allows authenticated attackers to access or modify resources belonging to other users by smuggling a conflicting value for any path-bound field via the query string or request body. In 'Elixir.GRPC.Server.Transcode':map_request/5 (lib/grpc/server/transcode.ex), all three clauses use Map.merge/2 with path bindings as the first argument, giving them the lowest merge precedence. A request such as GET /users/me/profile?user_id=victim (or a POST with {"user_id": "victim"} when body: "*") yields a decoded protobuf struct where the path-bound field carries the attacker-supplied value rather than the router-extracted value. Any handler that uses the path-bound field for authorization, multi-tenancy scoping, or ownership checks is silently bypassed. This issue affects grpc: from 0.8.0 before 1.0.0.
Quoted source text, attributed separately from HOL analysis.