dovecot: Fix of 7 CVEs

{
  "id": "1d7a8de00c7713cb89c04ddffb27a194134136d208ac8da9a8395018570d5c07",
  "url": "https://osv.dev/vulnerability/CLSA-2026-1792570553",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dovecot: Fix of 7 CVEs",
    "summary": "- CVE-2026-27852: bound the transient RFC 2231 parameter list and the MIME parameter budget so a single oversized Content-Type header cannot exhaust imap memory - CVE-2026-33263: track SMTP server connection closure so submission-login does not keep using a closed connection - CVE-2026-33605: fix ManageSieve parser handling of a single-byte quoted string read in managesieve-login - CVE-2026-40018: connect before expanding the passdb-sql password query and refuse to escape in the MySQL driver without a connection instead of escaping with the default charset - CVE-2026-42007: fix Sieve editheader edit-mail handling of deleted and NUL-containing header values - CVE-2026-42391: account external key/value pairs in the IMAP login ID command so a client cannot send an unbounded number of them - CVE-2026-73208: validate the OAuth2 token audience and stop falling back to the aud claim when audience is configured",
    "evidence": "osv:CLSA-2026-1792570553",
    "products": [
      {
        "name": {
          "value": "dovecot",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1:2.3.16-8.el9_2.tuxcare.els8",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "dovecot-devel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1:2.3.16-8.el9_2.tuxcare.els8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "dovecot-mysql",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1:2.3.16-8.el9_2.tuxcare.els8",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "dovecot-pgsql",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1:2.3.16-8.el9_2.tuxcare.els8",
            "evidence": "/affected/3/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "dovecot-pigeonhole",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "1:2.3.16-8.el9_2.tuxcare.els8",
            "evidence": "/affected/4/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CLSA-2026-1792570553",
      "aliases": [
        "CLSA-2026-1792570553"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1:2.3.16-8.el9_2.tuxcare.els8"
                }
              ]
            }
          ],
          "package": {
            "name": "dovecot",
            "purl": "pkg:rpm/tuxcare/dovecot?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1792570553.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1:2.3.16-8.el9_2.tuxcare.els8"
                }
              ]
            }
          ],
          "package": {
            "name": "dovecot-devel",
            "purl": "pkg:rpm/tuxcare/dovecot-devel?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1792570553.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1:2.3.16-8.el9_2.tuxcare.els8"
                }
              ]
            }
          ],
          "package": {
            "name": "dovecot-mysql",
            "purl": "pkg:rpm/tuxcare/dovecot-mysql?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1792570553.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1:2.3.16-8.el9_2.tuxcare.els8"
                }
              ]
            }
          ],
          "package": {
            "name": "dovecot-pgsql",
            "purl": "pkg:rpm/tuxcare/dovecot-pgsql?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1792570553.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1:2.3.16-8.el9_2.tuxcare.els8"
                }
              ]
            }
          ],
          "package": {
            "name": "dovecot-pigeonhole",
            "purl": "pkg:rpm/tuxcare/dovecot-pigeonhole?distro=almalinux-9.2",
            "ecosystem": "TuxCare:AlmaLinux:9.2"
          },
          "database_specific": {
            "source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.2esu/CLSA-2026-1792570553.json"
          }
        }
      ],
      "modified": "2026-10-26T09:31:00.261538056Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-27852",
        "CVE-2026-33263",
        "CVE-2026-33605",
        "CVE-2026-40018",
        "CVE-2026-42007",
        "CVE-2026-42391",
        "CVE-2026-73208"
      ],
      "references": [
        "https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2026-1792570553.html",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-27852",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-33263",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-33605",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-40018",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42007",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-42391",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-73208"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-27852",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-33263",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-33605",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-40018",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-42007",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-42391",
        "evidence": "/upstream"
      },
      {
        "value": "CVE-2026-73208",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 447377,
  "published_at": "2026-10-21T08:16:09+00:00"
}