CVE-2026-32687

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, from pkg:github/elixir-ecto/postgrex@266b530faf9bde094e31e0e4ab851f933fadc0f5 before 0.22.2.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:elixir-ecto:postgrex:*:*:*:*:*:*:*:* - VULNERABLE

elixir-ecto postgrex >= 0.16.0, < 0.22.2

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# Elixir PoC Example demonstrating the vulnerability
# Attacker controls the 'channel_name' input

# Malicious payload containing SQL injection
channel_name = "test_channel\"; DROP TABLE sensitive_data; --"

# Vulnerable call in postgrex < 0.22.2
# The resulting SQL will be: LISTEN "test_channel"; DROP TABLE sensitive_data; --"
# This allows execution of the DROP TABLE command.
Postgrex.Notifications.listen(pid, channel_name)

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-32687
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-32687
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-32687/
[4] VulDB https://vuldb.com/cve/CVE-2026-32687
[5] https://cna.erlef.org/cves/CVE-2026-32687.html
[6] https://github.com/elixir-ecto/ecto/security/advisories/GHSA-r73h-97w8-m54h
[7] https://github.com/elixir-ecto/postgrex/commit/7cdedbd4316bb65f82e6a9a4f922c0ac491cb770
[8] https://osv.dev/vulnerability/EEF-CVE-2026-32687

Raw JSON Data

JSON

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