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DEBIAN-CVE-2026-42392

Type: advisorySource: OSV1 source record

An attacker that has valid credentials can send an invalid IMAP URLFETCH command, which causes uninitialized memory to be included in the error response returned to the client. Process memory contents can be disclosed to the client, which may include sensitive data. Disable the IMAP URLAUTH functionality. Update to non-vulnerable version. No publicly available exploits are known.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-42392

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-2026-42392

dovecot

Source reference: /affected/0/package/name

Affected versions
1:2.4.1+dfsg1-6

Source reference: /affected/0/versions

1:2.4.1+dfsg1-6+deb13u1

Source reference: /affected/0/versions

1:2.4.1+dfsg1-6+deb13u2

Source reference: /affected/0/versions

1:2.4.1+dfsg1-6+deb13u3

Source reference: /affected/0/versions

1:2.4.1+dfsg1-6+deb13u4

Source reference: /affected/0/versions

1:2.4.1+dfsg1-6+deb13u5

Source reference: /affected/0/versions

1:2.4.1+dfsg1-6+deb13u6

Source reference: /affected/0/versions

Fixed versions
1:2.4.1+dfsg1-6+deb13u7

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

dovecot

Source reference: /affected/1/package/name

Affected versions
1:2.4.1+dfsg1-6

Source reference: /affected/1/versions

1:2.4.1+dfsg1-7

Source reference: /affected/1/versions

1:2.4.1+dfsg1-8

Source reference: /affected/1/versions

1:2.4.1+dfsg1-9

Source reference: /affected/1/versions

1:2.4.2+dfsg1-1

Source reference: /affected/1/versions

1:2.4.2+dfsg1-2

Source reference: /affected/1/versions

1:2.4.2+dfsg1-3

Source reference: /affected/1/versions

1:2.4.2+dfsg1-4

Source reference: /affected/1/versions

1:2.4.3+dfsg1-1

Source reference: /affected/1/versions

1:2.4.3+dfsg1-2

Source reference: /affected/1/versions

1:2.4.4+dfsg1-1

Source reference: /affected/1/versions

1:2.4.4+dfsg1-2

Source reference: /affected/1/versions

Fixed versions
1:2.4.5+dfsg1-1

Source reference: /affected/1/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": "1:2.4.1+dfsg1-6+deb13u7"
          }
        ]
      }
    ],
    "package": {
      "name": "dovecot",
      "purl": "pkg:deb/debian/dovecot?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1:2.4.1+dfsg1-6",
      "1:2.4.1+dfsg1-6+deb13u1",
      "1:2.4.1+dfsg1-6+deb13u2",
      "1:2.4.1+dfsg1-6+deb13u3",
      "1:2.4.1+dfsg1-6+deb13u4",
      "1:2.4.1+dfsg1-6+deb13u5",
      "1:2.4.1+dfsg1-6+deb13u6"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42392.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:2.4.5+dfsg1-1"
          }
        ]
      }
    ],
    "package": {
      "name": "dovecot",
      "purl": "pkg:deb/debian/dovecot?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1:2.4.1+dfsg1-6",
      "1:2.4.1+dfsg1-7",
      "1:2.4.1+dfsg1-8",
      "1:2.4.1+dfsg1-9",
      "1:2.4.2+dfsg1-1",
      "1:2.4.2+dfsg1-2",
      "1:2.4.2+dfsg1-3",
      "1:2.4.2+dfsg1-4",
      "1:2.4.3+dfsg1-1",
      "1:2.4.3+dfsg1-2",
      "1:2.4.4+dfsg1-1",
      "1:2.4.4+dfsg1-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42392.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56939 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement