{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "57e69e541b0718ca8724c2f61514322a2d859bc1"
            },
            {
              "fixed": "7e56347d420aaf43b2ee1586f4a230492ccf1642"
            }
          ],
          "repo": "https://github.com/dcit/perl-cryptx",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "CPANSec",
    "cwe_ids": [
      "CWE-121"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41565.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "0.088_001"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "fixed": "0.088_001"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers.\n\nThe gcm_decrypt_verify, ccm_decrypt_verify, chacha20poly1305_decrypt_verify and eax_decrypt_verify XS routines copied the caller-supplied authentication tag into a fixed 144-byte stack buffer (MAXBLOCKSIZE) without checking the supplied length. A longer tag overwrites the stack past the buffer. Version 0.088 added the clamp to gcm_decrypt_verify, and 0.088_001 added it to the other three.\n\nAny caller of an affected helper that forwards an attacker-controlled tag longer than the buffer can trigger the overflow.",
  "id": "CVE-2026-41565",
  "modified": "2026-07-08T05:39:27.566338636Z",
  "published": "2026-05-28T14:13:19.301Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/28/10"
    },
    {
      "type": "WEB",
      "url": "https://cpan.org/modules"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41565.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://metacpan.org/release/MIK/CryptX-0.088_001"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41565"
    },
    {
      "type": "FIX",
      "url": "https://github.com/DCIT/perl-CryptX/commit/57e69e541b0718ca8724c2f61514322a2d859bc1.patch"
    },
    {
      "type": "FIX",
      "url": "https://github.com/DCIT/perl-CryptX/commit/7e56347d420aaf43b2ee1586f4a230492ccf1642.patch"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/DCIT/perl-CryptX"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CryptX versions before 0.088_001 for Perl have a stack buffer overflow in four AEAD decrypt_verify helpers"
}