CVE-2026-15747

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{"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": "2026-07-15T16:32:58.629Z"}, "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"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-15747", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-07-15T16:31:33.252608Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-15T16:31:50.610Z"}}]}}

{"affected": [{"affectedData": [{"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"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "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."}, {"lang": "es", "value": "Las versiones de Mojolicious desde la 4.59 anteriores a la 9.48 para Perl exponen una representaci\u00f3n estable del token CSRF de la sesi\u00f3n a un or\u00e1culo de compresi\u00f3n BREACH.\n\n_csrf_token genera y almacena en cach\u00e9 un token por sesi\u00f3n y devuelve el mismo valor en cada llamada, y _csrf_field coloca ese valor en un campo de entrada oculto \u2019csrf_token\u2019. Cuando una respuesta que lleva el token tambi\u00e9n hace eco de entrada controlada por el atacante y est\u00e1 comprimida con gzip, los valores elegidos y las longitudes comprimidas resultantes forman un or\u00e1culo BREACH.\n\nUn atacante capaz de consultarlo puede recuperar el token y pasar la validaci\u00f3n de csrf_protect."}], "id": "CVE-2026-15747", "lastModified": "2026-10-24T21:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-15747", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-07-15T16:31:33.252608Z", "version": "2.0.3"}}]}, "published": "2026-07-14T18:17:12.587", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "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": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/07/14/16"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-204"}, {"lang": "en", "value": "CWE-352"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[4.59,9.48)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Mojolicious", "source": "cna", "vendor": "SRI"}, "product": "mojolicious", "vendor": "sri"}], "created": "2026-07-16T05:15:04.573791+00:00", "updated": "2026-07-31T08:00:04.795247+00:00", "vendors": ["sri", "sri$PRODUCT$mojolicious"]}