{
   "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": "Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle.  _csrf_token generates and caches one token per session and returns the same value on every call, and _csrf_field places that value in a hidden `csrf_token` input. When a response carrying the token also echoes attacker-controlled input and is gzip-compressed, the chosen values and the resulting compressed lengths form a BREACH oracle.  An attacker able to query it can recover the token and pass csrf_protect validation.",
            "title": "Vulnerability Description"
         }
      ],
      "publisher": {
         "category": "other",
         "contact_details": "gdt@cpan.org",
         "name": "giterlizzi",
         "namespace": "https://github.com/giterlizzi/"
      },
      "references": [
         {
            "category": "self",
            "summary": "CPANSA-Mojolicious-2026-15747 JSON",
            "url": "https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-mojolicious-2026-15747.json"
         },
         {
            "category": "external",
            "summary": "https://github.com/mojolicious/mojo/commit/01921fbbbbeca2d1397e082d4a647f9b84c24e27.patch",
            "url": "https://github.com/mojolicious/mojo/commit/01921fbbbbeca2d1397e082d4a647f9b84c24e27.patch"
         },
         {
            "category": "external",
            "summary": "https://metacpan.org/release/SRI/Mojolicious-9.48/changes",
            "url": "https://metacpan.org/release/SRI/Mojolicious-9.48/changes"
         },
         {
            "category": "external",
            "summary": "http://www.openwall.com/lists/oss-security/2026/07/14/16",
            "url": "http://www.openwall.com/lists/oss-security/2026/07/14/16"
         },
         {
            "category": "external",
            "summary": "CVE-2026-15747 (NVD)",
            "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15747"
         }
      ],
      "title": "Mojolicious vulnerability",
      "tracking": {
         "current_release_date": "2026-07-14T00:00:00",
         "generator": {
            "engine": {
               "name": "CSAF Perl Toolkit",
               "version": "0.26"
            }
         },
         "id": "CPANSA-Mojolicious-2026-15747",
         "initial_release_date": "2026-07-14T00:00:00",
         "revision_history": [
            {
               "date": "2026-07-14T00:00:00",
               "number": "1",
               "summary": "First release"
            }
         ],
         "status": "final",
         "version": "1"
      }
   },
   "product_tree": {
      "branches": [
         {
            "branches": [
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/>4.59|<9.48",
                  "product": {
                     "name": "Mojolicious greater than 4.59 and less than 9.48",
                     "product_id": "CSAFPID-0001",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/Mojolicious"
                     }
                  }
               },
               {
                  "category": "product_version_range",
                  "name": "vers:cpan/>=9.48",
                  "product": {
                     "name": "Mojolicious greater than or equal 9.48",
                     "product_id": "CSAFPID-0002",
                     "product_identification_helper": {
                        "purl": "pkg:cpan/Mojolicious"
                     }
                  }
               }
            ],
            "category": "product_name",
            "name": "Mojolicious"
         }
      ]
   },
   "vulnerabilities": [
      {
         "cve": "CVE-2026-15747",
         "cwe": {
            "id": "CWE-204",
            "name": "Observable Response Discrepancy"
         },
         "notes": [
            {
               "category": "description",
               "text": "Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle.\n\n_csrf_token generates and caches one token per session and returns the same value on every call, and _csrf_field places that value in a hidden `csrf_token` input. When a response carrying the token also echoes attacker-controlled input and is gzip-compressed, the chosen values and the resulting compressed lengths form a BREACH oracle.\n\nAn attacker able to query it can recover the token and pass csrf_protect validation.",
               "title": "Vulnerability Description"
            }
         ],
         "product_status": {
            "fixed": [
               "CSAFPID-0002"
            ],
            "known_affected": [
               "CSAFPID-0001"
            ]
         },
         "scores": [
            {
               "cvss_v3": {
                  "baseScore": 9.1,
                  "baseSeverity": "CRITICAL",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                  "version": "3.1"
               },
               "products": [
                  "CSAFPID-0001"
               ]
            }
         ]
      }
   ]
}