UnratedFix available

DEBIAN-CVE-2026-3446

Type: advisorySource: OSV1 source record

When calling base64.b64decode() or related functions the decoding process would stop after encountering the first padded quad regardless of whether there was more information to be processed. This can lead to data being accepted which may be processed differently by other implementations. Use "validate=True" to enable stricter processing of base64 data.

Announced 10 Apr 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-3446

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-2026-3446

python3.11

Source reference: /affected/0/package/name

Affected versions: 3.11.2-6
Source reference: /affected/0/versions
3.11.2-6+deb12u1
Source reference: /affected/0/versions
3.11.2-6+deb12u2
Source reference: /affected/0/versions
3.11.2-6+deb12u3
Source reference: /affected/0/versions
3.11.2-6+deb12u4
Source reference: /affected/0/versions
3.11.2-6+deb12u5
Source reference: /affected/0/versions
3.11.2-6+deb12u6
Source reference: /affected/0/versions
3.11.2-6+deb12u7
Source reference: /affected/0/versions
3.11.2-6+deb12u8
Source reference: /affected/0/versions
3.11.3-1
Source reference: /affected/0/versions
3.11.3-2
Source reference: /affected/0/versions
3.11.4-1
Source reference: /affected/0/versions
3.11.5-1
Source reference: /affected/0/versions
3.11.5-2
Source reference: /affected/0/versions
3.11.5-3
Source reference: /affected/0/versions
3.11.6-1
Source reference: /affected/0/versions
3.11.6-2
Source reference: /affected/0/versions
3.11.6-3
Source reference: /affected/0/versions
3.11.6-3~hurd.2
Source reference: /affected/0/versions
3.11.7-1
Source reference: /affected/0/versions
3.11.7-2
Source reference: /affected/0/versions
3.11.8-1
Source reference: /affected/0/versions
3.11.8-1.1~exp1
Source reference: /affected/0/versions
3.11.8-1.1~exp2
Source reference: /affected/0/versions
3.11.8-2
Source reference: /affected/0/versions
3.11.8-3
Source reference: /affected/0/versions
3.11.8-3+hurd.1
Source reference: /affected/0/versions
3.11.9-1
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

python3.13

Source reference: /affected/1/package/name

Affected versions: 3.13.5-2
Source reference: /affected/1/versions
3.13.5-2+deb13u1
Source reference: /affected/1/versions
Fixed versions: 3.13.5-2+deb13u2
Source reference: /affected/1/ranges
Prerequisites: Not stated in this record

python3.13

Source reference: /affected/2/package/name

Affected versions: 3.13.11-1
Source reference: /affected/2/versions
3.13.12-1
Source reference: /affected/2/versions
3.13.5-2
Source reference: /affected/2/versions
3.13.6-1
Source reference: /affected/2/versions
3.13.7-1
Source reference: /affected/2/versions
3.13.8-1
Source reference: /affected/2/versions
3.13.9-1
Source reference: /affected/2/versions
Fixed versions: 3.13.14-1
Source reference: /affected/2/ranges
Prerequisites: Not stated in this record

python3.14

Source reference: /affected/3/package/name

Affected versions: 3.14.0-1
Source reference: /affected/3/versions
3.14.0-2
Source reference: /affected/3/versions
3.14.0-3
Source reference: /affected/3/versions
3.14.0-4
Source reference: /affected/3/versions
3.14.0-5
Source reference: /affected/3/versions
3.14.0~a7-1
Source reference: /affected/3/versions
3.14.0~b1-1
Source reference: /affected/3/versions
3.14.0~b2-1
Source reference: /affected/3/versions
3.14.0~b3-1
Source reference: /affected/3/versions
3.14.0~b4-1
Source reference: /affected/3/versions
3.14.0~rc1-1
Source reference: /affected/3/versions
3.14.0~rc2-1
Source reference: /affected/3/versions
3.14.0~rc3-1
Source reference: /affected/3/versions
3.14.2-1
Source reference: /affected/3/versions
3.14.3-1
Source reference: /affected/3/versions
3.14.3-2
Source reference: /affected/3/versions
3.14.3-3
Source reference: /affected/3/versions
3.14.3-4
Source reference: /affected/3/versions
3.14.3-5
Source reference: /affected/3/versions
Fixed versions: 3.14.4-1
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": "python3.11",
      "purl": "pkg:deb/debian/python3.11?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.11.2-6",
      "3.11.2-6+deb12u1",
      "3.11.2-6+deb12u2",
      "3.11.2-6+deb12u3",
      "3.11.2-6+deb12u4",
      "3.11.2-6+deb12u5",
      "3.11.2-6+deb12u6",
      "3.11.2-6+deb12u7",
      "3.11.2-6+deb12u8",
      "3.11.3-1",
      "3.11.3-2",
      "3.11.4-1",
      "3.11.5-1",
      "3.11.5-2",
      "3.11.5-3",
      "3.11.6-1",
      "3.11.6-2",
      "3.11.6-3",
      "3.11.6-3~hurd.2",
      "3.11.7-1",
      "3.11.7-2",
      "3.11.8-1",
      "3.11.8-1.1~exp1",
      "3.11.8-1.1~exp2",
      "3.11.8-2",
      "3.11.8-3",
      "3.11.8-3+hurd.1",
      "3.11.9-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3446.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.13.5-2+deb13u2"
          }
        ]
      }
    ],
    "package": {
      "name": "python3.13",
      "purl": "pkg:deb/debian/python3.13?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.13.5-2",
      "3.13.5-2+deb13u1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3446.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.13.14-1"
          }
        ]
      }
    ],
    "package": {
      "name": "python3.13",
      "purl": "pkg:deb/debian/python3.13?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.13.11-1",
      "3.13.12-1",
      "3.13.5-2",
      "3.13.6-1",
      "3.13.7-1",
      "3.13.8-1",
      "3.13.9-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3446.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "3.14.4-1"
          }
        ]
      }
    ],
    "package": {
      "name": "python3.14",
      "purl": "pkg:deb/debian/python3.14?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.14.0-1",
      "3.14.0-2",
      "3.14.0-3",
      "3.14.0-4",
      "3.14.0-5",
      "3.14.0~a7-1",
      "3.14.0~b1-1",
      "3.14.0~b2-1",
      "3.14.0~b3-1",
      "3.14.0~b4-1",
      "3.14.0~rc1-1",
      "3.14.0~rc2-1",
      "3.14.0~rc3-1",
      "3.14.2-1",
      "3.14.3-1",
      "3.14.3-2",
      "3.14.3-3",
      "3.14.3-4",
      "3.14.3-5"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3446.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #56829 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 16:51:22 GMT
Publisher date: Fri, 10 Apr 2026 19:16:26 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-3446 · Revision 1Source updated