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DEBIAN-CVE-2026-6665

Type: advisorySource: OSV1 source record

The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend that sends a SCRAM server-final-message with a long nonce can trigger a stack overflow.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-6665

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:DEBIAN-CVE-2026-6665

pgbouncer

Source reference: /affected/0/package/name

Affected versions
1.18.0-1

Source reference: /affected/0/versions

1.18.0-1+deb12u1

Source reference: /affected/0/versions

1.19.0-1

Source reference: /affected/0/versions

1.19.1-1

Source reference: /affected/0/versions

1.20.0-1

Source reference: /affected/0/versions

1.20.1-1

Source reference: /affected/0/versions

1.21.0-1

Source reference: /affected/0/versions

1.22.0-1

Source reference: /affected/0/versions

1.22.1-1

Source reference: /affected/0/versions

1.23.0-1

Source reference: /affected/0/versions

1.23.1-1

Source reference: /affected/0/versions

1.24.0-2

Source reference: /affected/0/versions

1.24.0-3

Source reference: /affected/0/versions

1.24.1-1

Source reference: /affected/0/versions

1.25.0-1

Source reference: /affected/0/versions

1.25.0-2

Source reference: /affected/0/versions

1.25.1-1

Source reference: /affected/0/versions

1.25.2-1

Source reference: /affected/0/versions

1.26.0-1

Source reference: /affected/0/versions

1.26.0-2

Source reference: /affected/0/versions

1.26.0-3

Source reference: /affected/0/versions

1.26.0-4

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

pgbouncer

Source reference: /affected/1/package/name

Affected versions
1.24.1-1

Source reference: /affected/1/versions

1.24.1-1+deb13u1

Source reference: /affected/1/versions

Fixed versions
1.24.1-1+deb13u2

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

pgbouncer

Source reference: /affected/2/package/name

Affected versions
1.24.1-1

Source reference: /affected/2/versions

1.25.0-1

Source reference: /affected/2/versions

1.25.0-2

Source reference: /affected/2/versions

1.25.1-1

Source reference: /affected/2/versions

Fixed versions
1.25.2-1

Source reference: /affected/2/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"
          }
        ]
      }
    ],
    "package": {
      "name": "pgbouncer",
      "purl": "pkg:deb/debian/pgbouncer?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "1.18.0-1",
      "1.18.0-1+deb12u1",
      "1.19.0-1",
      "1.19.1-1",
      "1.20.0-1",
      "1.20.1-1",
      "1.21.0-1",
      "1.22.0-1",
      "1.22.1-1",
      "1.23.0-1",
      "1.23.1-1",
      "1.24.0-2",
      "1.24.0-3",
      "1.24.1-1",
      "1.25.0-1",
      "1.25.0-2",
      "1.25.1-1",
      "1.25.2-1",
      "1.26.0-1",
      "1.26.0-2",
      "1.26.0-3",
      "1.26.0-4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6665.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.24.1-1+deb13u2"
          }
        ]
      }
    ],
    "package": {
      "name": "pgbouncer",
      "purl": "pkg:deb/debian/pgbouncer?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1.24.1-1",
      "1.24.1-1+deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6665.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.25.2-1"
          }
        ]
      }
    ],
    "package": {
      "name": "pgbouncer",
      "purl": "pkg:deb/debian/pgbouncer?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1.24.1-1",
      "1.25.0-1",
      "1.25.0-2",
      "1.25.1-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-6665.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#58305 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-6665 · Revision 1Source updated