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DEBIAN-CVE-2026-47086

Type: advisorySource: OSV1 source record

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. GENURLAUTH-issued tokens can bypass ACLs. Any authenticated user could mint a URLAUTH token (via the GENURLAUTH command) for any mailbox they could name, even without read access on it. This would allow reading mail from mailboxes despite having no granted permissions.

Announced Group revision 1
Original source ↗

DEBIAN-CVE-2026-47086

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-2026-47086

cyrus-imapd

Source reference: /affected/0/package/name

Affected versions
3.6.1-4

Source reference: /affected/0/versions

3.6.1-4+deb12u1

Source reference: /affected/0/versions

3.6.1-4+deb12u2

Source reference: /affected/0/versions

3.6.1-4+deb12u3

Source reference: /affected/0/versions

3.6.1-4+deb12u4

Source reference: /affected/0/versions

Fixed versions
3.6.1-4+deb12u5

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

cyrus-imapd

Source reference: /affected/1/package/name

Affected versions
3.10.2-1

Source reference: /affected/1/versions

3.10.2-1+deb13u1

Source reference: /affected/1/versions

Fixed versions
3.10.2-1+deb13u2

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

cyrus-imapd

Source reference: /affected/2/package/name

Affected versions
3.10.2-1

Source reference: /affected/2/versions

3.12.0-1

Source reference: /affected/2/versions

3.12.0-2

Source reference: /affected/2/versions

3.12.1-1

Source reference: /affected/2/versions

3.12.1-2

Source reference: /affected/2/versions

3.12.1-3

Source reference: /affected/2/versions

3.12.2-1

Source reference: /affected/2/versions

3.12.3-1~bpo13+1

Source reference: /affected/2/versions

Fixed versions
3.12.3-1

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"
          },
          {
            "fixed": "3.6.1-4+deb12u5"
          }
        ]
      }
    ],
    "package": {
      "name": "cyrus-imapd",
      "purl": "pkg:deb/debian/cyrus-imapd?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.6.1-4",
      "3.6.1-4+deb12u1",
      "3.6.1-4+deb12u2",
      "3.6.1-4+deb12u3",
      "3.6.1-4+deb12u4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47086.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.10.2-1+deb13u2"
          }
        ]
      }
    ],
    "package": {
      "name": "cyrus-imapd",
      "purl": "pkg:deb/debian/cyrus-imapd?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.10.2-1",
      "3.10.2-1+deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47086.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.12.3-1"
          }
        ]
      }
    ],
    "package": {
      "name": "cyrus-imapd",
      "purl": "pkg:deb/debian/cyrus-imapd?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.10.2-1",
      "3.12.0-1",
      "3.12.0-2",
      "3.12.1-1",
      "3.12.1-2",
      "3.12.1-3",
      "3.12.2-1",
      "3.12.3-1~bpo13+1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-47086.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56591 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. DEBIAN-CVE-2026-47086 · Revision 1Source updated