PYSEC-2026-1811

Vulnerability from pysec - Published: 2026-07-07 11:45 - Updated: 2026-07-07 17:25
VLAI
Details

PyCryptodome and pycryptodomex before 3.19.1 allow side-channel leakage for OAEP decryption, exploitable for a Manger attack.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Impacted products
Name purl
pycryptodome pkg:pypi/pycryptodome
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "pycryptodome",
        "purl": "pkg:pypi/pycryptodome"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.19.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0",
        "3.0rc1",
        "3.1",
        "3.10.1",
        "3.10.3",
        "3.10.4",
        "3.11.0",
        "3.12.0",
        "3.13.0",
        "3.14.0",
        "3.14.1",
        "3.15.0",
        "3.16.0",
        "3.17",
        "3.18.0",
        "3.19.0",
        "3.2",
        "3.2.1",
        "3.3",
        "3.3.1",
        "3.4",
        "3.4.11",
        "3.4.3",
        "3.4.4",
        "3.4.5",
        "3.4.6",
        "3.4.7",
        "3.4.8",
        "3.4.9",
        "3.5.0",
        "3.5.1",
        "3.6.0",
        "3.6.1",
        "3.6.3",
        "3.6.4",
        "3.6.5",
        "3.6.6",
        "3.7.0",
        "3.7.1",
        "3.7.2",
        "3.7.3",
        "3.8.0",
        "3.8.1",
        "3.8.2",
        "3.9.0",
        "3.9.1",
        "3.9.2",
        "3.9.3",
        "3.9.4",
        "3.9.6",
        "3.9.7",
        "3.9.8",
        "3.9.9"
      ]
    }
  ],
  "aliases": [
    "CVE-2023-52323",
    "GHSA-j225-cvw7-qrx7"
  ],
  "details": "PyCryptodome and pycryptodomex before 3.19.1 allow side-channel leakage for OAEP decryption, exploitable for a Manger attack.",
  "id": "PYSEC-2026-1811",
  "modified": "2026-07-07T17:25:10.229266Z",
  "published": "2026-07-07T11:45:29.466835Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52323"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Legrandin/pycryptodome/commit/0deea1bfe1489e8c80d2053bbb06a1aa0b181ebd"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Legrandin/pycryptodome"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Legrandin/pycryptodome/blob/master/Changelog.rst"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/pycryptodomex/PYSEC-2024-3.yaml"
    },
    {
      "type": "WEB",
      "url": "https://pypi.org/project/pycryptodomex/#history"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/pycryptodome"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-j225-cvw7-qrx7"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PyCryptodome and pycryptodomex side-channel leakage for OAEP decryption"
}



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