UnratedFix available

DEBIAN-CVE-2026-32884

Type: advisorySource: OSV1 source record

Botan is a C++ cryptography library. Prior to version 3.11.0, during processing of an X.509 certificate path using name constraints which restrict the set of allowable DNS names, if no subject alternative name is defined in the end-entity certificate Botan would check that the CN was allowed by the DNS name constraints, even though this check is technically not required by RFC 5280. However this check failed to account for the possibility of a mixed-case CN. Thus a certificate with CN=Sub.EVIL.COM and no subject alternative name would bypasses an excludedSubtrees constraint for evil.com because the comparison is case-sensitive. This issue has been patched in version 3.11.0.

Announced 30 Mar 2026Source revision 1

Original source ↗

DEBIAN-CVE-2026-32884

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-2026-32884

botan

Source reference: /affected/0/package/name

Affected versions: 2.19.3+dfsg-1
Source reference: /affected/0/versions
2.19.3+dfsg-1+deb12u1
Source reference: /affected/0/versions
2.19.4+dfsg-1
Source reference: /affected/0/versions
2.19.5+dfsg-1
Source reference: /affected/0/versions
2.19.5+dfsg-2
Source reference: /affected/0/versions
2.19.5+dfsg-3
Source reference: /affected/0/versions
2.19.5+dfsg-4
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

botan

Source reference: /affected/1/package/name

Affected versions: 2.19.5+dfsg-4
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

botan3

Source reference: /affected/2/package/name

Affected versions: 3.10.0+dfsg-1
Source reference: /affected/2/versions
3.10.0+dfsg-2
Source reference: /affected/2/versions
3.11.0+dfsg-1
Source reference: /affected/2/versions
3.7.1+dfsg-2
Source reference: /affected/2/versions
3.8.1+dfsg-1
Source reference: /affected/2/versions
3.9.0+dfsg-1
Source reference: /affected/2/versions
3.9.0+dfsg-2
Source reference: /affected/2/versions
3.9.0+dfsg-2.1
Source reference: /affected/2/versions
Fixed versions: 3.11.0+dfsg-2
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

botan3

Source reference: /affected/3/package/name

Affected versions: 3.10.0+dfsg-1
Source reference: /affected/3/versions
3.10.0+dfsg-2
Source reference: /affected/3/versions
3.11.0+dfsg-1
Source reference: /affected/3/versions
3.7.1+dfsg-2
Source reference: /affected/3/versions
3.8.1+dfsg-1
Source reference: /affected/3/versions
3.9.0+dfsg-1
Source reference: /affected/3/versions
3.9.0+dfsg-2
Source reference: /affected/3/versions
3.9.0+dfsg-2.1
Source reference: /affected/3/versions
Fixed versions: 3.11.0+dfsg-2
Source reference: /affected/3/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": "botan",
      "purl": "pkg:deb/debian/botan?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "2.19.3+dfsg-1",
      "2.19.3+dfsg-1+deb12u1",
      "2.19.4+dfsg-1",
      "2.19.5+dfsg-1",
      "2.19.5+dfsg-2",
      "2.19.5+dfsg-3",
      "2.19.5+dfsg-4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32884.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "botan",
      "purl": "pkg:deb/debian/botan?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2.19.5+dfsg-4"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32884.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.11.0+dfsg-2"
          }
        ]
      }
    ],
    "package": {
      "name": "botan3",
      "purl": "pkg:deb/debian/botan3?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.10.0+dfsg-1",
      "3.10.0+dfsg-2",
      "3.11.0+dfsg-1",
      "3.7.1+dfsg-2",
      "3.8.1+dfsg-1",
      "3.9.0+dfsg-1",
      "3.9.0+dfsg-2",
      "3.9.0+dfsg-2.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32884.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.11.0+dfsg-2"
          }
        ]
      }
    ],
    "package": {
      "name": "botan3",
      "purl": "pkg:deb/debian/botan3?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.10.0+dfsg-1",
      "3.10.0+dfsg-2",
      "3.11.0+dfsg-1",
      "3.7.1+dfsg-2",
      "3.8.1+dfsg-1",
      "3.9.0+dfsg-1",
      "3.9.0+dfsg-2",
      "3.9.0+dfsg-2.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32884.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #57536 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 17:19:33 GMT
Publisher date: Mon, 30 Mar 2026 21:17:10 GMT

Read the original announcement