{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.207"
              },
              {
                "fixed": "2.220"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "ddfe67584a228877e5d28840da75ff32e435a5e3"
            },
            {
              "fixed": "f1979570091697409f4792e5d401bbf8fb4b20b6"
            },
            {
              "fixed": "33c89d03d6e746ed2ead4f2f6570d47864c61bc7"
            }
          ],
          "repo": "https://github.com/pmqs/io-compress",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "CPANSec",
    "cwe_ids": [
      "CWE-755"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48961.json"
  },
  "details": "IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID.\n\nWhen decode_ux() in bin/zipdetails handles an Info-ZIP Unix Extra Field (tag 0x7875) with UID Size or GID Size set to 8, causing zipdetails to decode an 8-byte UID or GID value, it dispatches through decodeLitteEndian(), which calls a misnamed helper unpackValueQ. The actual function defined in the same file is unpackValue_Q (with underscore); the call raises 'Undefined subroutine \u0026main::unpackValueQ' and the script exits with status 255.\n\nLibrary callers of IO::Compress and IO::Uncompress are not affected; the defect is in the bundled CLI tool.",
  "id": "CVE-2026-48961",
  "modified": "2026-08-12T03:51:11.946169794Z",
  "published": "2026-05-27T02:34:52.228Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/27/3"
    },
    {
      "type": "WEB",
      "url": "https://cpan.org/modules"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48961.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://metacpan.org/release/PMQS/IO-Compress-2.220/changes"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48961"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pmqs/IO-Compress/commit/33c89d03d6e746ed2ead4f2f6570d47864c61bc7.patch"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pmqs/IO-Compress"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "IO::Compress versions from 2.207 before 2.220 for Perl ship a zipdetails CLI tool that crashes with undefined subroutine on Info-ZIP Unix Extra Field with 8-byte UID or GID"
}