Description
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in elixir-ecto postgrex ('Elixir.Postgrex.Notifications' module) allows SQL Injection.
The channel argument passed to 'Elixir.Postgrex.Notifications':listen/3 and 'Elixir.Postgrex.Notifications':unlisten/3 is interpolated directly into LISTEN "..." / UNLISTEN "..." SQL statements without escaping the " character. An attacker who can influence the channel name can inject a " to break out of the quoted identifier and append arbitrary SQL. Because the notifications connection uses the PostgreSQL simple query protocol, multi-statement payloads are accepted, allowing DDL and DML commands to be chained (e.g. ; DROP TABLE ...; --). The same unsanitized interpolation also occurs in handle_connect/1 when replaying LISTEN commands after a reconnect.
This vulnerability is associated with program file lib/postgrex/notifications.ex and program routines 'Elixir.Postgrex.Notifications':listen/3, 'Elixir.Postgrex.Notifications':unlisten/3, 'Elixir.Postgrex.Notifications':handle_connect/1.
This issue affects postgrex: from 0.16.0 before 0.22.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| elixir-ecto | postgrex | 0.16.0 – < 0.22.2 | 0.22.2 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Hex | postgrex | >= 0.16.0, < 0.22.2 | 0.22.2 | EEF-CVE-2026-32687 |
References
- https://github.com/elixir-ecto/ecto/security/advisories/GHSA-r73h-97w8-m54h vendor-advisory related
- https://cna.erlef.org/cves/CVE-2026-32687.html related
- https://osv.dev/vulnerability/EEF-CVE-2026-32687 related
- https://github.com/elixir-ecto/postgrex/commit/7cdedbd4316bb65f82e6a9a4f922c0ac491cb770 patch