SQL injection via channel name in Postgrex.Notifications.listen/3 and unlisten/3

{
  "id": "2aaf123cffc190c6897e9710bf56bf16c02c6ba2e556d9e26afd643f52a797bc",
  "url": "https://osv.dev/vulnerability/CVE-2026-32687",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "SQL injection via channel name in Postgrex.Notifications.listen/3 and unlisten/3",
    "summary": "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.",
    "evidence": "osv:CVE-2026-32687",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-32687",
      "aliases": [
        "CVE-2026-32687",
        "EEF-CVE-2026-32687",
        "GHSA-r73h-97w8-m54h"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/elixir-ecto/postgrex",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b7dd776cf3a3796352be1530ea601a7fefe8854b"
                },
                {
                  "fixed": "52c61171cc5b5ac21a78c60c33cfc62792e9ec32"
                },
                {
                  "fixed": "7cdedbd4316bb65f82e6a9a4f922c0ac491cb770"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:elixir-ecto:postgrex:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.16.0"
                      },
                      {
                        "fixed": "0.22.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7cdedbd4316bb65f82e6a9a4f922c0ac491cb770"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            },
            {
              "repo": "https://github.com/elixir-ecto/postgrex.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "266b530faf9bde094e31e0e4ab851f933fadc0f5"
                },
                {
                  "fixed": "7cdedbd4316bb65f82e6a9a4f922c0ac491cb770"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "266b530faf9bde094e31e0e4ab851f933fadc0f5"
                      },
                      {
                        "fixed": "7cdedbd4316bb65f82e6a9a4f922c0ac491cb770"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.22.1",
            "v0.21.1",
            "v0.21.0",
            "v0.20.0",
            "v0.19.3",
            "v0.19.2",
            "v0.19.1",
            "v0.19.0",
            "v0.18.0",
            "v0.17.5",
            "v0.17.4",
            "v0.17.3",
            "v0.17.2",
            "v0.17.1",
            "v0.17.0",
            "v0.16.5",
            "v0.16.4",
            "v0.16.3",
            "v0.16.2",
            "v0.16.1",
            "v0.16.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32687.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.521162021Z",
      "provider": "osv",
      "references": [
        "https://cna.erlef.org/cves/CVE-2026-32687.html",
        "https://github.com",
        "https://osv.dev/vulnerability/EEF-CVE-2026-32687",
        "https://repo.hex.pm",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32687.json",
        "https://github.com/elixir-ecto/ecto/security/advisories/GHSA-r73h-97w8-m54h",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-32687",
        "https://github.com/elixir-ecto/postgrex/commit/7cdedbd4316bb65f82e6a9a4f922c0ac491cb770",
        "https://github.com/elixir-ecto/postgrex.git"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-89"
        ],
        "cna_assigner": "EEF",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32687.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-32687",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499524,
  "published_at": "2026-05-12T14:18:07.607+00:00"
}