EEF-CVE-2026-48599
- Source
- https://cna.erlef.org/osv/EEF-CVE-2026-48599.html
- Import Source
- https://cna.erlef.org/osv/EEF-CVE-2026-48599.json
- JSON Data
- https://api.osv.dev/v1/vulns/EEF-CVE-2026-48599
- Aliases
-
- CVE-2026-48599
- GHSA-mwr4-5g34-j5cq
- Published
- 2026-06-15T21:55:28.702Z
- Modified
- 2026-06-15T22:26:29.403177793Z
- Severity
-
- 7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Authorization bypass via path binding override in elixir-grpc/grpc HTTP transcoding
- Details
-
Summary
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.
Configuration
HTTP-to-gRPC transcoding must be enabled.
- Database specific
{ "cpe_ids": [ "cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*" ], "capec_ids": [ "CAPEC-460" ], "cwe_ids": [ "CWE-639" ] }- References
- Credits
-
-
- Peter Ullrich - FINDER
-
- Paulo Valente - REMEDIATION_DEVELOPER
-
- Jonatan Männchen - ANALYST
-
Affected packages
Hex / grpc
Package
- Name
- grpc
- Purl
- pkg:hex/grpc