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ALPINE-CVE-2026-6637

Type: advisorySource: OSV1 source record

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Announced Group revision 1
Original source ↗

ALPINE-CVE-2026-6637

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:ALPINE-CVE-2026-6637

postgresql15

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
15.18-r0

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

postgresql16

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
16.14-r0

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

postgresql16

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
16.14-r0

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

postgresql16

Source reference: /affected/3/package/name

Affected versions
Not stated in this record
Fixed versions
16.14-r0

Source reference: /affected/3/ranges

Prerequisites
Not stated in this record

postgresql17

Source reference: /affected/4/package/name

Affected versions
Not stated in this record
Fixed versions
17.10-r0

Source reference: /affected/4/ranges

Prerequisites
Not stated in this record

postgresql17

Source reference: /affected/5/package/name

Affected versions
Not stated in this record
Fixed versions
17.10-r0

Source reference: /affected/5/ranges

Prerequisites
Not stated in this record

postgresql17

Source reference: /affected/6/package/name

Affected versions
Not stated in this record
Fixed versions
17.10-r0

Source reference: /affected/6/ranges

Prerequisites
Not stated in this record

postgresql17

Source reference: /affected/7/package/name

Affected versions
Not stated in this record
Fixed versions
17.10-r0

Source reference: /affected/7/ranges

Prerequisites
Not stated in this record

postgresql18

Source reference: /affected/8/package/name

Affected versions
Not stated in this record
Fixed versions
18.4-r0

Source reference: /affected/8/ranges

Prerequisites
Not stated in this record

postgresql18

Source reference: /affected/9/package/name

Affected versions
Not stated in this record
Fixed versions
18.4-r0

Source reference: /affected/9/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "15.18-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "postgresql15",
      "purl": "pkg:apk/alpine/postgresql15?arch=source",
      "ecosystem": "Alpine:v3.20"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6637.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "16.14-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "postgresql16",
      "purl": "pkg:apk/alpine/postgresql16?arch=source",
      "ecosystem": "Alpine:v3.20"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6637.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "16.14-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "postgresql16",
      "purl": "pkg:apk/alpine/postgresql16?arch=source",
      "ecosystem": "Alpine:v3.21"
    },
    "database_specific": {
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    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
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          },
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          }
        ]
      }
    ],
    "package": {
      "name": "postgresql16",
      "purl": "pkg:apk/alpine/postgresql16?arch=source",
      "ecosystem": "Alpine:v3.22"
    },
    "database_specific": {
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    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
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            "introduced": "0"
          },
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          }
        ]
      }
    ],
    "package": {
      "name": "postgresql17",
      "purl": "pkg:apk/alpine/postgresql17?arch=source",
      "ecosystem": "Alpine:v3.21"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6637.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "17.10-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "postgresql17",
      "purl": "pkg:apk/alpine/postgresql17?arch=source",
      "ecosystem": "Alpine:v3.22"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6637.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "17.10-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "postgresql17",
      "purl": "pkg:apk/alpine/postgresql17?arch=source",
      "ecosystem": "Alpine:v3.23"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6637.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "17.10-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "postgresql17",
      "purl": "pkg:apk/alpine/postgresql17?arch=source",
      "ecosystem": "Alpine:v3.24"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6637.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "18.4-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "postgresql18",
      "purl": "pkg:apk/alpine/postgresql18?arch=source",
      "ecosystem": "Alpine:v3.23"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6637.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "18.4-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "postgresql18",
      "purl": "pkg:apk/alpine/postgresql18?arch=source",
      "ecosystem": "Alpine:v3.24"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-6637.json"
    },
    "ecosystem_specific": {}
  }
]

Publisher severity

No explicit severity was provided.

Event
#54633 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. ALPINE-CVE-2026-6637 · Revision 1Source updated