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High

Security advisory

Type: advisorySources: OSVCVE: CVE-2026-50736

The pglogical queue mechanism, used to convey out-of-band commands such as replicated DDL from a publisher to a subscriber, executes message payloads on the subscriber at the privilege level of the apply worker, which is equivalent to a PostgreSQL superuser in default installations. A party acting as the publisher can send crafted queue messages that cause arbitrary SQL to be executed on the subscriber as superuser, escalating from a role permitted to use pglogical to full superuser and breaking the isolation between tenants in shared deployments. To exploit the issue an attacker must be able to direct a subscription at an endpoint they control. In default installations this requires privileges normally reserved for a superuser, so the issue is most relevant to managed deployments where the ability to create subscriptions has been delegated to non-superuser roles.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-50736
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 09:42 UTC · Revision 1

Source evidence

CVE-2026-50736

core-osv · Original source

Published 28 Jul 2026, 19:17 UTC

The pglogical queue mechanism, used to convey out-of-band commands such as replicated DDL from a publisher to a subscriber, executes message payloads on the subscriber at the privilege level of the apply worker, which is equivalent to a PostgreSQL superuser in default installations. A party acting as the publisher can send crafted queue messages that cause arbitrary SQL to be executed on the subscriber as superuser, escalating from a role permitted to use pglogical to full superuser and breaking the isolation between tenants in shared deployments. To exploit the issue an attacker must be able to direct a subscription at an endpoint they control. In default installations this requires privileges normally reserved for a superuser, so the issue is most relevant to managed deployments where the ability to create subscriptions has been delegated to non-superuser roles.

osv:CVE-2026-50736
Complete source record
{
  "id": "af397251b41fe48058c6cc4f24066abb843499bcfc00258f1caba21e33f7577e",
  "url": "https://osv.dev/vulnerability/CVE-2026-50736",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-50736",
    "summary": "The pglogical queue mechanism, used to convey out-of-band commands such as replicated DDL from a publisher to a subscriber, executes message payloads on the subscriber at the privilege level of the apply worker, which is equivalent to a PostgreSQL superuser in default installations. A party acting as the publisher can send crafted queue messages that cause arbitrary SQL to be executed on the subscriber as superuser, escalating from a role permitted to use pglogical to full superuser and breaking the isolation between tenants in shared deployments. To exploit the issue an attacker must be able to direct a subscription at an endpoint they control. In default installations this requires privileges normally reserved for a superuser, so the issue is most relevant to managed deployments where the ability to create subscriptions has been delegated to non-superuser roles.",
    "evidence": "osv:CVE-2026-50736",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-50736",
      "aliases": [
        "CVE-2026-50736"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/2ndquadrant/pglogical",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a23c44acb46cfa0e47b6f2eb54d822c475c03c89"
                },
                {
                  "fixed": "9a0e182745885ad0152ea387988c95a483396a81"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:enterprisedb:pglogical:*:*:*:*:*:postgresql:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.4.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "REL2_4_7",
            "REL2_4_6",
            "REL2_4_5",
            "REL2_4_4",
            "REL2_4_3",
            "REL2_4_2",
            "REL2_4_1",
            "REL2_4_0",
            "REL2_3_4",
            "REL2_3_3",
            "REL2_3_2",
            "REL2_3_1",
            "REL2_3_0",
            "REL2_2_2",
            "REL2_2_1",
            "REL2_2_0",
            "REL2_1_1",
            "REL2_1_0",
            "REL2_0_1",
            "REL2_0_0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50736.json"
          }
        }
      ],
      "modified": "2026-10-25T02:30:24.437103261Z",
      "provider": "osv",
      "references": [
        "https://www.enterprisedb.com/docs/security/advisories/cve202650736/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-50736",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 444548,
  "published_at": "2026-07-28T19:17:36.7+00:00"
}