{
  "cveId": "CVE-2026-3446",
  "url": "https://patchblox.com/security/cve/CVE-2026-3446",
  "summary": "CVE-2026-3446 is fixed in 22 products on 2 platforms, first by Python 3.13 3.13.13, released April 7, 2026. 9 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Base64 decoding stops at first padded quad by default",
  "description": "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 \u0022validate=True\u0022 to enable stricter processing of base64 data.",
  "published": "2026-04-10T19:16:26Z",
  "severity": "moderate",
  "cvss": 6,
  "cwe": "CWE-345: Insufficient Verification of Data Authenticity",
  "epss": 0.00179,
  "epssPercentile": 0.07524,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2026-3446",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Python 3.13",
      "fixedVersion": "3.13.13",
      "fix": "Python 3.13 3.13.13",
      "url": "https://patchblox.com/security/fix/windows-app/python.python.3.13-3.13.13",
      "released": "2026-04-07T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Python 3.14",
      "fixedVersion": "3.14.4",
      "fix": "Python 3.14 3.14.4",
      "url": "https://patchblox.com/security/fix/windows-app/python.python.3.14-3.14.4",
      "released": "2026-04-07T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python",
      "release": "sles 15.7",
      "fixedVersion": "2.7.18-150000.117.1",
      "fix": "SUSE-SU-2026:1503-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1503-1",
      "released": "2026-04-20T16:17:54Z"
    },
    {
      "platform": "linux",
      "product": "python-base",
      "release": "sles 15.7",
      "fixedVersion": "2.7.18-150000.117.1",
      "fix": "SUSE-SU-2026:1503-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1503-1",
      "released": "2026-04-20T16:17:54Z"
    },
    {
      "platform": "linux",
      "product": "python-unversioned-command",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.13.14-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21459-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21459-1",
      "released": "2026-07-28T09:32:02Z"
    },
    {
      "platform": "linux",
      "product": "python3",
      "release": "sles 15.6",
      "fixedVersion": "3.6.15-150300.10.129.1",
      "fix": "SUSE-SU-2026:4754-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4754-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "python3",
      "release": "sles 15.7",
      "fixedVersion": "3.6.15-150300.10.129.1",
      "fix": "SUSE-SU-2026:4754-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4754-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "python3-core",
      "release": "sles 15.6",
      "fixedVersion": "3.6.15-150300.10.129.1",
      "fix": "SUSE-SU-2026:4754-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4754-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "python3-core",
      "release": "sles 15.7",
      "fixedVersion": "3.6.15-150300.10.129.1",
      "fix": "SUSE-SU-2026:4754-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4754-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "python3-debug",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-devel",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-idle",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-libs",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-test",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-tkinter",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3.13",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.13.5-2\u002Bdeb13u2",
      "fix": "DEBIAN-CVE-2026-3446",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-3446",
      "released": "2026-04-10T19:16:26Z"
    },
    {
      "platform": "linux",
      "product": "python3.14",
      "release": "Debian 14",
      "fixedVersion": "3.14.4-1",
      "fix": "DEBIAN-CVE-2026-3446",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-3446",
      "released": "2026-04-10T19:16:26Z"
    },
    {
      "platform": "linux",
      "product": "python3.9-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3.9-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "3.9.25-1.amzn2023.0.7",
      "fix": "ALAS2023-2026-1933",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1933",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python313",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.13.14-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21459-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21459-1",
      "released": "2026-07-28T09:32:02Z"
    },
    {
      "platform": "linux",
      "product": "python313",
      "release": "sles 15.7",
      "fixedVersion": "3.13.13-150700.4.50.1",
      "fix": "SUSE-SU-2026:2464-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2464-1",
      "released": "2026-06-19T09:44:32Z"
    },
    {
      "platform": "linux",
      "product": "python313-core",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.13.14-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21459-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21459-1",
      "released": "2026-07-28T09:32:02Z"
    },
    {
      "platform": "linux",
      "product": "python313-core",
      "release": "sles 15.7",
      "fixedVersion": "3.13.13-150700.4.50.1",
      "fix": "SUSE-SU-2026:2464-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2464-1",
      "released": "2026-06-19T09:44:32Z"
    },
    {
      "platform": "linux",
      "product": "python313-documentation",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.13.14-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21459-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21459-1",
      "released": "2026-07-28T09:32:02Z"
    },
    {
      "platform": "linux",
      "product": "python313-nogil",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.13.14-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21459-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21459-1",
      "released": "2026-07-28T09:32:02Z"
    },
    {
      "platform": "linux",
      "product": "python313-nogil-nogil-core",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "3.13.14-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21459-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21459-1",
      "released": "2026-07-28T09:32:02Z"
    }
  ],
  "noFixYet": [
    {
      "platform": "Windows apps",
      "product": "Python 2",
      "status": "no-fix",
      "affectedVersion": "2.7.18150"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.10",
      "status": "no-fix",
      "affectedVersion": "3.10.11"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.11",
      "status": "no-fix",
      "affectedVersion": "3.11.9"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.12",
      "status": "no-fix",
      "affectedVersion": "3.12.10"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.5",
      "status": "no-fix",
      "affectedVersion": "3.5.4"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.6",
      "status": "no-fix",
      "affectedVersion": "3.6.8"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.7",
      "status": "no-fix",
      "affectedVersion": "3.7.9"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.8",
      "status": "no-fix",
      "affectedVersion": "3.8.10"
    },
    {
      "platform": "Windows apps",
      "product": "Python 3.9",
      "status": "no-fix",
      "affectedVersion": "3.9.13"
    }
  ],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}