{
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        "providerMetadata": {
          "dateUpdated": "2026-07-14T19:30:12.894Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/07/14/16"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Mojolicious",
          "product": "Mojolicious",
          "programFiles": [
            "lib/Mojolicious/Plugin/DefaultHelpers.pm",
            "lib/Mojolicious/Plugin/TagHelpers.pm",
            "lib/Mojolicious/Renderer.pm"
          ],
          "programRoutines": [
            {
              "name": "Mojolicious::Plugin::DefaultHelpers::_csrf_token"
            }
          ],
          "repo": "https://github.com/mojolicious/mojo",
          "vendor": "SRI",
          "versions": [
            {
              "lessThan": "9.48",
              "status": "affected",
              "version": "4.59",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-204",
              "description": "CWE-204 Observable Response Discrepancy",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-352",
              "description": "CWE-352 Cross-Site Request Forgery (CSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-14T17:07:32.593Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/mojolicious/mojo/commit/01921fbbbbeca2d1397e082d4a647f9b84c24e27.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/SRI/Mojolicious-9.48/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Mojolicious 9.48 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-14T00:00:00.000Z",
          "value": "Version 9.48 released with fix."
        }
      ],
      "title": "Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-15747",
    "datePublished": "2026-07-14T17:07:32.593Z",
    "dateReserved": "2026-07-14T15:03:43.632Z",
    "dateUpdated": "2026-07-14T19:30:12.894Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-15747\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2026-07-14T18:17:12.587\",\"lastModified\":\"2026-07-14T20:16:57.837\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"affected\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"affectedData\":[{\"vendor\":\"SRI\",\"product\":\"Mojolicious\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://cpan.org/modules\",\"packageName\":\"Mojolicious\",\"programFiles\":[\"lib/Mojolicious/Plugin/DefaultHelpers.pm\",\"lib/Mojolicious/Plugin/TagHelpers.pm\",\"lib/Mojolicious/Renderer.pm\"],\"programRoutines\":[{\"name\":\"Mojolicious::Plugin::DefaultHelpers::_csrf_token\"}],\"repo\":\"https://github.com/mojolicious/mojo\",\"versions\":[{\"version\":\"4.59\",\"lessThan\":\"9.48\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-204\"},{\"lang\":\"en\",\"value\":\"CWE-352\"}]}],\"references\":[{\"url\":\"https://github.com/mojolicious/mojo/commit/01921fbbbbeca2d1397e082d4a647f9b84c24e27.patch\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/SRI/Mojolicious-9.48/changes\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/07/14/16\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}