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BREW-CRYPTOGRAPHY-CVE-20… (CVE-2026-39892)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:41 – Updated: 2026-09-09 23:49 – Source website
VLAI
Summary
cryptography has a buffer overflow if non-contiguous buffers were passed to APIs
Details

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.

References
http://www.openwall.com/lists/oss-security/2026/0… WEB
https://security.access.redhat.com/data/csaf/v2/v… WEB
https://access.redhat.com/errata/RHSA-2026:19375 ADVISORY
https://access.redhat.com/errata/RHSA-2026:20338 ADVISORY
https://access.redhat.com/errata/RHSA-2026:21017 ADVISORY
https://access.redhat.com/errata/RHSA-2026:22465 ADVISORY
https://access.redhat.com/errata/RHSA-2026:22629 ADVISORY
https://access.redhat.com/errata/RHSA-2026:22840 ADVISORY
https://access.redhat.com/errata/RHSA-2026:23361 ADVISORY
https://access.redhat.com/errata/RHSA-2026:24483 ADVISORY
https://access.redhat.com/errata/RHSA-2026:24761 ADVISORY
https://access.redhat.com/errata/RHSA-2026:24762 ADVISORY
https://access.redhat.com/errata/RHSA-2026:24853 ADVISORY
https://access.redhat.com/errata/RHSA-2026:24866 ADVISORY
https://access.redhat.com/errata/RHSA-2026:24977 ADVISORY
https://access.redhat.com/errata/RHSA-2026:30088 ADVISORY
https://access.redhat.com/errata/RHSA-2026:30089 ADVISORY
https://access.redhat.com/errata/RHSA-2026:37275 ADVISORY
https://access.redhat.com/errata/RHSA-2026:42644 ADVISORY
https://access.redhat.com/errata/RHSA-2026:43651 ADVISORY
https://access.redhat.com/errata/RHSA-2026:43670 ADVISORY
https://access.redhat.com/errata/RHSA-2026:43851 ADVISORY
https://access.redhat.com/errata/RHSA-2026:43853 ADVISORY
https://access.redhat.com/errata/RHSA-2026:43854 ADVISORY
https://access.redhat.com/errata/RHSA-2026:43855 ADVISORY
https://access.redhat.com/errata/RHSA-2026:46956 ADVISORY
https://access.redhat.com/errata/RHSA-2026:7295 ADVISORY
https://access.redhat.com/security/cve/CVE-2026-39892 ADVISORY
https://github.com/CVEProject/cvelistV5/tree/main… ADVISORY
https://github.com/pyca/cryptography/security/adv… ADVISORY
https://nvd.nist.gov/vuln/detail/CVE-2026-39892 ADVISORY
https://bugzilla.redhat.com/show_bug.cgi?id=2456735 REPORT

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "46.0.7"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "cryptography",
        "purl": "pkg:brew/cryptography"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "50.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "git",
    "upstream_evidence": [
      {
        "ecosystem": "GIT",
        "key": "https://github.com/pyca/cryptography",
        "name": "https://github.com/pyca/cryptography",
        "strategy": "git",
        "subject_version": "50.0.1"
      },
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/cryptography@50.0.1",
        "name": "cryptography",
        "strategy": "registry",
        "subject_version": "50.0.1"
      }
    ]
  },
  "details": "cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.",
  "id": "BREW-cryptography-CVE-2026-39892",
  "modified": "2026-09-09T23:49:07Z",
  "published": "2026-08-13T16:41:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/04/08/12"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39892.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:19375"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:20338"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:21017"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:22465"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:22629"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:22840"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:23361"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:24483"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:24761"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:24762"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:24853"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:24866"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:24977"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:30088"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:30089"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:37275"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:42644"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:43651"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:43670"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:43851"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:43853"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:43854"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:43855"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:46956"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:7295"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/security/cve/CVE-2026-39892"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39892.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39892"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456735"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "cryptography has a buffer overflow if non-contiguous buffers were passed to APIs",
  "upstream": [
    "CVE-2026-39892",
    "GHSA-p423-j2cm-9vmq",
    "PYSEC-2026-36"
  ]
}



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