{
   "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": "HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion.  Support for the <template> element was added to libgumbo 0.10.0 in 2015, but the walk_tree function in lib/HTML/Gumbo.xs was not updated to support it. The element was treated as a text-node, where strlen() over-reads the heap block that the pointer addresses.  Any caller that runs parse() with the default format => 'string', or with format => 'tree', on input containing a <template> element serializes the over-read bytes into the returned result, disclosing bounded heap contents. format => 'callback' reaches a croak on the unhandled node type and is unaffected.",
            "title": "Vulnerability Description"
         }
      ],
      "publisher": {
         "category": "other",
         "contact_details": "gdt@cpan.org",
         "name": "giterlizzi",
         "namespace": "https://github.com/giterlizzi/"
      },
      "references": [
         {
            "category": "self",
            "summary": "CPANSA-HTML-Gumbo-2025-15646 JSON",
            "url": "https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-html-gumbo-2025-15646.json"
         },
         {
            "category": "external",
            "summary": "https://bugs.debian.org/1104789",
            "url": "https://bugs.debian.org/1104789"
         },
         {
            "category": "external",
            "summary": "https://github.com/bestpractical/HTML-Gumbo/commit/15c0598909d4a64f47ef0a1abc5051f4e113c186.patch",
            "url": "https://github.com/bestpractical/HTML-Gumbo/commit/15c0598909d4a64f47ef0a1abc5051f4e113c186.patch"
         },
         {
            "category": "external",
            "summary": "https://metacpan.org/release/BPS/HTML-Gumbo-0.19/changes",
            "url": "https://metacpan.org/release/BPS/HTML-Gumbo-0.19/changes"
         },
         {
            "category": "external",
            "summary": "http://www.openwall.com/lists/oss-security/2026/07/01/7",
            "url": "http://www.openwall.com/lists/oss-security/2026/07/01/7"
         },
         {
            "category": "external",
            "summary": "CVE-2025-15646 (NVD)",
            "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-15646"
         }
      ],
      "title": "HTML-Gumbo vulnerability",
      "tracking": {
         "current_release_date": "2026-07-01T00:00:00",
         "generator": {
            "engine": {
               "name": "CSAF Perl Toolkit",
               "version": "0.26"
            }
         },
         "id": "CPANSA-HTML-Gumbo-2025-15646",
         "initial_release_date": "2026-07-01T00:00:00",
         "revision_history": [
            {
               "date": "2026-07-01T00:00:00",
               "number": "1",
               "summary": "First release"
            }
         ],
         "status": "final",
         "version": "1"
      }
   },
   "product_tree": {
      "branches": [
         {
            "branches": [
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/<0.19",
                  "product": {
                     "name": "HTML-Gumbo less than 0.19",
                     "product_id": "CSAFPID-0001",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/HTML-Gumbo"
                     }
                  }
               },
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/>=0.19",
                  "product": {
                     "name": "HTML-Gumbo greater than or equal 0.19",
                     "product_id": "CSAFPID-0002",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/HTML-Gumbo"
                     }
                  }
               }
            ],
            "category": "product_name",
            "name": "HTML-Gumbo"
         }
      ]
   },
   "vulnerabilities": [
      {
         "cve": "CVE-2025-15646",
         "cwe": {
            "id": "CWE-125",
            "name": "Out-of-bounds Read"
         },
         "notes": [
            {
               "category": "description",
               "text": "HTML::Gumbo versions before 0.19 for Perl disclose heap memory via type confusion.\n\nSupport for the <template> element was added to libgumbo 0.10.0 in 2015, but the walk_tree function in lib/HTML/Gumbo.xs was not updated to support it. The element was treated as a text-node, where strlen() over-reads the heap block that the pointer addresses.\n\nAny caller that runs parse() with the default format => 'string', or with format => 'tree', on input containing a <template> element serializes the over-read bytes into the returned result, disclosing bounded heap contents. format => 'callback' reaches a croak on the unhandled node type and is unaffected.",
               "title": "Vulnerability Description"
            }
         ],
         "product_status": {
            "fixed": [
               "CSAFPID-0002"
            ],
            "known_affected": [
               "CSAFPID-0001"
            ]
         },
         "scores": [
            {
               "cvss_v3": {
                  "baseScore": 9.8,
                  "baseSeverity": "CRITICAL",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "version": "3.1"
               },
               "products": [
                  "CSAFPID-0001"
               ]
            }
         ]
      }
   ]
}