{
   "document": {
      "category": "csaf_security_advisory",
      "csaf_version": "2.0",
      "distribution": {
         "tlp": {
            "label": "WHITE",
            "url": "https://www.first.org/tlp/"
         }
      },
      "lang": "en",
      "notes": [
         {
            "category": "description",
            "text": "WWW::Mechanize::Cached versions before 2.00 for Perl deserialize cached HTTP responses from a world-writable on-disk cache, enabling local response forgery and code execution.  With no explicit cache backend, WWW::Mechanize::Cached constructs a default Cache::FileCache under /tmp/FileCache without overriding the backend's documented directory_umask of 000, so the cache root and its subdirectories are created mode 0777 with no sticky bit. Cache entries are named by sha1_hex of the request and read back through Storable::thaw on the next cache hit.  A local attacker with write access to the cache tree can replace a victim's cache entry for a known URL with an arbitrary frozen HTTP::Response blob, causing the victim's next get() of that URL to return attacker controlled response bytes. Because the bytes are passed to Storable::thaw, a victim process that has loaded any class with a side-effectful STORABLE_thaw, DESTROY, or overload hook can be escalated to arbitrary code execution.",
            "title": "Vulnerability Description"
         }
      ],
      "publisher": {
         "category": "other",
         "contact_details": "gdt@cpan.org",
         "name": "giterlizzi",
         "namespace": "https://github.com/giterlizzi/"
      },
      "references": [
         {
            "category": "self",
            "summary": "CPANSA-WWW-Mechanize-Cached-2026-8612 JSON",
            "url": "https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-www-mechanize-cached-2026-8612.json"
         },
         {
            "category": "external",
            "summary": "https://github.com/libwww-perl/WWW-Mechanize-Cached/commit/b821647deeedf83490ebc1db91d959d942300ce0.patch",
            "url": "https://github.com/libwww-perl/WWW-Mechanize-Cached/commit/b821647deeedf83490ebc1db91d959d942300ce0.patch"
         },
         {
            "category": "external",
            "summary": "https://github.com/libwww-perl/WWW-Mechanize-Cached/pull/36",
            "url": "https://github.com/libwww-perl/WWW-Mechanize-Cached/pull/36"
         },
         {
            "category": "external",
            "summary": "https://metacpan.org/release/OALDERS/WWW-Mechanize-Cached-2.00/changes",
            "url": "https://metacpan.org/release/OALDERS/WWW-Mechanize-Cached-2.00/changes"
         },
         {
            "category": "external",
            "summary": "http://www.openwall.com/lists/oss-security/2026/05/15/1",
            "url": "http://www.openwall.com/lists/oss-security/2026/05/15/1"
         },
         {
            "category": "external",
            "summary": "CVE-2026-8612 (NVD)",
            "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8612"
         }
      ],
      "title": "WWW-Mechanize-Cached vulnerability",
      "tracking": {
         "current_release_date": "2026-05-15T00:00:00",
         "generator": {
            "engine": {
               "name": "CSAF Perl Toolkit",
               "version": "0.26"
            }
         },
         "id": "CPANSA-WWW-Mechanize-Cached-2026-8612",
         "initial_release_date": "2026-05-15T00:00:00",
         "revision_history": [
            {
               "date": "2026-05-15T00:00:00",
               "number": "1",
               "summary": "First release"
            }
         ],
         "status": "final",
         "version": "1"
      }
   },
   "product_tree": {
      "branches": [
         {
            "branches": [
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/<2.00",
                  "product": {
                     "name": "WWW-Mechanize-Cached less than 2.00",
                     "product_id": "CSAFPID-0001",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/WWW-Mechanize-Cached"
                     }
                  }
               },
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/>=2.00",
                  "product": {
                     "name": "WWW-Mechanize-Cached greater than or equal 2.00",
                     "product_id": "CSAFPID-0002",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/WWW-Mechanize-Cached"
                     }
                  }
               }
            ],
            "category": "product_name",
            "name": "WWW-Mechanize-Cached"
         }
      ]
   },
   "vulnerabilities": [
      {
         "cve": "CVE-2026-8612",
         "cwe": {
            "id": "CWE-502",
            "name": "Deserialization of Untrusted Data"
         },
         "notes": [
            {
               "category": "description",
               "text": "WWW::Mechanize::Cached versions before 2.00 for Perl deserialize cached HTTP responses from a world-writable on-disk cache, enabling local response forgery and code execution.\n\nWith no explicit cache backend, WWW::Mechanize::Cached constructs a default Cache::FileCache under /tmp/FileCache without overriding the backend's documented directory_umask of 000, so the cache root and its subdirectories are created mode 0777 with no sticky bit. Cache entries are named by sha1_hex of the request and read back through Storable::thaw on the next cache hit.\n\nA local attacker with write access to the cache tree can replace a victim's cache entry for a known URL with an arbitrary frozen HTTP::Response blob, causing the victim's next get() of that URL to return attacker controlled response bytes. Because the bytes are passed to Storable::thaw, a victim process that has loaded any class with a side-effectful STORABLE_thaw, DESTROY, or overload hook can be escalated to arbitrary code execution.",
               "title": "Vulnerability Description"
            }
         ],
         "product_status": {
            "fixed": [
               "CSAFPID-0002"
            ],
            "known_affected": [
               "CSAFPID-0001"
            ]
         },
         "scores": [
            {
               "cvss_v3": {
                  "baseScore": 5.3,
                  "baseSeverity": "MEDIUM",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
                  "version": "3.1"
               },
               "products": [
                  "CSAFPID-0001"
               ]
            }
         ]
      }
   ]
}