CVE-2026-9487

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-9487", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-05-24T13:47:37.954Z", "datePublished": "2026-08-03T13:14:43.135Z", "dateUpdated": "2026-08-03T19:59:47.580Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "XML-Sig", "product": "XML::Sig", "programFiles": ["lib/XML/Sig.pm"], "programRoutines": [{"name": "XML::Sig::verify"}, {"name": "XML::Sig::_get_signed_xml"}], "repo": "https://github.com/perl-net-saml2/perl-XML-Sig", "vendor": "TIMLEGGE", "versions": [{"lessThan": "0.71", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "XML::Sig versions before 0.71 for Perl allow signature wrapping via duplicate ID.\n\n_get_signed_xml() in lib/XML/Sig.pm, called from verify(), resolves the SignedInfo Reference/@URI to a node with the XPath expression \"//*[@ID='$id']\" and returns the first node of the resulting node set. A document in which two elements share that ID value is accepted: the digest and signature are checked against whichever element comes first in document order, and the duplicate is not detected.\n\nSuch a document verifies successfully while an application that resolves the same ID independently can read the second, attacker supplied element; in a SAML2 context this places the contents of an Assertion under attacker control."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-347", "description": "CWE-347 Improper Verification of Cryptographic Signature", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-08-03T13:14:43.135Z"}, "references": [{"tags": ["patch"], "url": "https://github.com/perl-net-saml2/perl-XML-Sig/commit/4976bde5245df69b8e02c6ae061acbd4891cd7f9.patch"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/TIMLEGGE/XML-Sig-0.71/source/Changes"}], "solutions": [{"lang": "en", "value": "Upgrade to version 0.71"}], "source": {"discovery": "UNKNOWN"}, "title": "XML::Sig versions before 0.71 for Perl allow signature wrapping via duplicate ID", "workarounds": [{"lang": "en", "value": "Signing the outermost <samlp:Response> element rather than only the inner <saml:Assertion> reduces exposure, but does not prevent wrapping variants in which the duplicate ID is introduced outside the signed element. Upgrading to 0.71 is the complete fix."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"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": {"timestamp": "2026-08-03T19:59:25.051641Z", "id": "CVE-2026-9487", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-03T19:59:47.580Z"}}]}}

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{"affected": [{"affectedData": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "XML-Sig", "product": "XML::Sig", "programFiles": ["lib/XML/Sig.pm"], "programRoutines": [{"name": "XML::Sig::verify"}, {"name": "XML::Sig::_get_signed_xml"}], "repo": "https://github.com/perl-net-saml2/perl-XML-Sig", "vendor": "TIMLEGGE", "versions": [{"lessThan": "0.71", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:xml\\:\\:sig_project:xml\\:\\:sig:*:*:*:*:*:perl:*:*", "matchCriteriaId": "FC1BDEFE-0662-4F7C-9641-A32B9CF06366", "versionEndExcluding": "0.71", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "XML::Sig versions before 0.71 for Perl allow signature wrapping via duplicate ID.\n\n_get_signed_xml() in lib/XML/Sig.pm, called from verify(), resolves the SignedInfo Reference/@URI to a node with the XPath expression \"//*[@ID='$id']\" and returns the first node of the resulting node set. A document in which two elements share that ID value is accepted: the digest and signature are checked against whichever element comes first in document order, and the duplicate is not detected.\n\nSuch a document verifies successfully while an application that resolves the same ID independently can read the second, attacker supplied element; in a SAML2 context this places the contents of an Assertion under attacker control."}, {"lang": "es", "value": "Las versiones de XML::Sig anteriores a la 0.71 para Perl permiten la envoltura de firma a trav\u00e9s de un ID duplicado.\n\n_get_signed_xml() en lib/XML/Sig.pm, llamado desde verify(), resuelve el SignedInfo Reference/@URI a un nodo con la expresi\u00f3n XPath \u2019//*[@ID=\u2019$id\u2019]\u2019 y devuelve el primer nodo del conjunto de nodos resultante. Se acepta un documento en el que dos elementos comparten ese valor de ID: el resumen y la firma se verifican contra el elemento que aparece primero en el orden del documento, y no se detecta el duplicado.\n\nDicho documento se verifica con \u00e9xito mientras que una aplicaci\u00f3n que resuelve el mismo ID de forma independiente puede leer el segundo elemento, el suministrado por el atacante; en un contexto SAML2, esto coloca el contenido de una \u2019Assertion\u2019 bajo el control del atacante."}], "id": "CVE-2026-9487", "lastModified": "2026-10-23T21:10:00.157", "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-2026-9487", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-03T19:59:25.051641Z", "version": "2.0.3"}}]}, "published": "2026-08-03T14:16:31.110", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Patch"], "url": "https://github.com/perl-net-saml2/perl-XML-Sig/commit/4976bde5245df69b8e02c6ae061acbd4891cd7f9.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Release Notes"], "url": "https://metacpan.org/release/TIMLEGGE/XML-Sig-0.71/source/Changes"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,0.71)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "XML::Sig", "source": "cna", "vendor": "TIMLEGGE"}, "product": "xml::sig", "vendor": "timlegge"}], "created": "2026-08-03T15:51:30.932559+00:00", "updated": "2026-08-04T10:30:07.269244+00:00", "vendors": ["timlegge", "timlegge$PRODUCT$xml::sig"]}