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DEBIAN-CVE-2026-24031

Type: advisorySource: OSV1 source record

Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin. This vulnerability allows bypassing authentication for any user and user enumeration. Do not clear auth_username_chars. If this is not possible, install latest fixed version. No publicly available exploits are known.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-24031

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-2026-24031

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

Fixed versions
1:2.4.1+dfsg1-6+deb13u4

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

Fixed versions
1:2.4.3+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+deb13u4"
          }
        ]
      }
    ],
    "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"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-24031.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1:2.4.3+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"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-24031.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56646 · Revision 1
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Publisher date
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