{
  "cveId": "CVE-2026-34181",
  "url": "https://patchblox.com/security/cve/CVE-2026-34181",
  "summary": "CVE-2026-34181 is fixed in 14 products on 1 platform, first by libssl3t64 3.5.5-1ubuntu3.2, released June 8, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "PKCS#12 Files with PBMAC1 Are Accepted with Short HMAC Keys",
  "description": "Issue Summary: The PKCS#12 file processing fails to perform sufficient input validation for files that use Password-Based Message Authentication Code 1 (PBMAC1) integrity mechanism allowing a certificate and private key forgery.  Impact Summary: An attacker impersonating a user can cause a service reading PKCS#12 files to accept forged certificates and private keys with a 1 in 256 probability.  If a service accepting PKCS#12 files is using passwords for authenticating the received files, the attacker can create unencrypted PKCS#12 files that use PBMAC1 authentication that specifies an HMAC key of only one byte, allowing them to craft a file that will be accepted with a 1 in 256 probability. That would then cause the service to accept a certificate and private key controlled by the attacker.  The FIPS modules are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.",
  "published": "2026-06-08T17:00:00Z",
  "severity": "Important",
  "cvss": 9.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "cwe": "Improper Validation of Integrity Check Value",
  "epss": 0.00376,
  "epssPercentile": 0.31846,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34181",
  "fixes": [
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.5.3-1ubuntu3.4",
      "fix": "libssl3t64 3.5.3-1ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libssl3t64-3.5.3-1ubuntu3.4",
      "released": "2026-06-24T14:07:44Z"
    },
    {
      "platform": "linux",
      "product": "libssl3t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu3.2",
      "fix": "libssl3t64 3.5.5-1ubuntu3.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libssl3t64-3.5.5-1ubuntu3.2",
      "released": "2026-06-08T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "3.5.6-1~deb13u2",
      "fix": "DEBIAN-CVE-2026-34181",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-34181",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Debian 14",
      "fixedVersion": "3.6.3-1",
      "fix": "DEBIAN-CVE-2026-34181",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-34181",
      "released": "2026-06-24T14:07:24Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "RHEL 10",
      "fixedVersion": "3.5.5-4.el10_2",
      "fix": "RHSA-2026:25237",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-25237",
      "released": "2026-06-24T14:09:17Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "RHEL 9",
      "fixedVersion": "1:3.5.5-4.el9_8",
      "fix": "RHSA-2026:25239",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-25239",
      "released": "2026-06-24T14:09:17Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "3.5.3-1ubuntu3.4",
      "fix": "openssl 3.5.3-1ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-openssl-3.5.3-1ubuntu3.4",
      "released": "2026-06-24T14:07:44Z"
    },
    {
      "platform": "linux",
      "product": "openssl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.5.5-1ubuntu3.2",
      "fix": "openssl 3.5.5-1ubuntu3.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-openssl-3.5.5-1ubuntu3.2",
      "released": "2026-06-08T17:00:00Z"
    },
    {
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      "product": "openssl",
      "release": "almalinux 10",
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      "fix": "ALSA-2026:25237",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-25237",
      "released": "2026-06-11T00:00:00Z"
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    {
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      "fix": "ALSA-2026:25239",
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      "released": "2026-06-11T00:00:00Z"
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    {
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      "product": "openssl",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1853",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1853",
      "released": "2026-06-22T09:00:00Z"
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    {
      "platform": "linux",
      "product": "openssl",
      "release": "ol 10",
      "fixedVersion": "1:3.5.5-5.0.1.el10_2",
      "fix": "ELSA-2026-25237",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-25237",
      "released": "2026-07-28T00:00:00Z"
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    {
      "platform": "linux",
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      "fix": "ELSA-2026-25239",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-25239",
      "released": "2026-06-23T00:00:00Z"
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    {
      "platform": "linux",
      "product": "openssl",
      "release": "rocky 10",
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      "fix": "RLSA-2026:25237",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-25237",
      "released": "2026-06-13T00:05:06Z"
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      "fix": "RLSA-2026:25239",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-25239",
      "released": "2026-06-13T00:03:17Z"
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    {
      "platform": "linux",
      "product": "openssl-3",
      "release": "opensuse-leap 16.0",
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      "fix": "OPENSUSE-SU-2026:21744-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21744-1",
      "released": "2026-09-02T15:55:21Z"
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      "platform": "linux",
      "product": "openssl-3",
      "release": "sles 15.7",
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      "fix": "SUSE-SU-2026:4039-1",
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      "released": "2026-09-07T08:29:17Z"
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      "fix": "SUSE-SU-2026:23609-1",
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      "released": "2026-09-02T15:59:12Z"
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      "platform": "linux",
      "product": "openssl-debuginfo",
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      "fix": "ALAS2023-2026-1853",
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      "released": "2026-06-22T09:00:00Z"
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    {
      "platform": "linux",
      "product": "openssl-debugsource",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1853",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1853",
      "released": "2026-06-22T09:00:00Z"
    },
    {
      "platform": "linux",
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      "fix": "RHSA-2026:25239",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-25239",
      "released": "2026-06-24T14:09:17Z"
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    {
      "platform": "linux",
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      "release": "almalinux 10",
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      "url": "https://patchblox.com/security/fix/linux/alsa-2026-25237",
      "released": "2026-06-11T00:00:00Z"
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      "released": "2026-06-11T00:00:00Z"
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      "released": "2026-06-22T09:00:00Z"
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    {
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      "fix": "ELSA-2026-25237",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-25237",
      "released": "2026-07-28T00:00:00Z"
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      "released": "2026-06-22T09:00:00Z"
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    {
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      "fix": "ELSA-2026-25237",
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      "fix": "ELSA-2026-25239",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-25239",
      "released": "2026-06-23T00:00:00Z"
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    {
      "platform": "linux",
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      "release": "Ubuntu 25.10 (questing)",
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      "fix": "openssl-provider-legacy 3.5.3-1ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-openssl-provider-legacy-3.5.3-1ubuntu3.4",
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    },
    {
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-openssl-provider-legacy-3.5.5-1ubuntu3.2",
      "released": "2026-06-08T17:00:00Z"
    },
    {
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      "released": "2026-06-22T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}