GHSA-J88V-2CHJ-QFWX

Vulnerability from github – Published: 2026-04-22 20:46 – Updated: 2026-05-13 13:30
VLAI
Summary
pgx: SQL Injection via placeholder confusion with dollar quoted string literals
Details

Impact

SQL Injection can occur when:

  1. The non-default simple protocol is used.
  2. A dollar quoted string literal is used in the SQL query.
  3. That string literal contains text that would be would be interpreted as a placeholder outside of a string literal.
  4. The value of that placeholder is controllable by the attacker.

e.g.

attackValue := `$tag$; drop table canary; --`
_, err = tx.Exec(ctx, `select $tag$ $1 $tag$, $1`, pgx.QueryExecModeSimpleProtocol, attackValue)

This is unlikely to occur outside of a contrived scenario.

Patches

The problem is resolved in v5.9.2.

Workarounds

Do not use the simple protocol to execute queries matching all the above conditions.

Severity
2.3 (Low)
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/jackc/pgx/v5"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.9.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/jackc/pgx/v4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "4.18.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/jackc/pgx"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "3.6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-41889"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-89"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-22T20:46:51Z",
    "nvd_published_at": "2026-05-08T17:16:31Z",
    "severity": "LOW"
  },
  "details": "### Impact\n\nSQL Injection can occur when:\n\n1. The non-default simple protocol is used.\n2. A dollar quoted string literal is used in the SQL query.\n3. That string literal contains text that would be would be interpreted as a placeholder outside of a string literal.\n4. The value of that placeholder is controllable by the attacker.\n\ne.g.\n\n```go\nattackValue := `$tag$; drop table canary; --`\n_, err = tx.Exec(ctx, `select $tag$ $1 $tag$, $1`, pgx.QueryExecModeSimpleProtocol, attackValue)\n```\n\nThis is unlikely to occur outside of a contrived scenario.\n\n### Patches\n\nThe problem is resolved in v5.9.2.\n\n### Workarounds\n\nDo not use the simple protocol to execute queries matching all the above conditions.",
  "id": "GHSA-j88v-2chj-qfwx",
  "modified": "2026-05-13T13:30:26Z",
  "published": "2026-04-22T20:46:51Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/jackc/pgx/security/advisories/GHSA-j88v-2chj-qfwx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41889"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jackc/pgx/commit/60644f84918a8af66d14a4b0d865d4edafd955da"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/jackc/pgx"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jackc/pgx/releases/tag/v5.9.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "pgx: SQL Injection via placeholder confusion with dollar quoted string literals"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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