{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-15747", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-07-14T15:03:43.632Z", "datePublished": "2026-07-14T17:07:32.593Z", "dateUpdated": "2026-07-14T19:30:12.894Z"}, "containers": {"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": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-07-14T17:07:32.593Z"}, "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"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/07/14/16"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-07-14T19:30:12.894Z"}}]}}

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