{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18092", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-07-28T16:46:56.926Z", "datePublished": "2026-08-03T13:24:52.137Z", "dateUpdated": "2026-08-03T13:24:52.137Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "Net-SAML2", "product": "Net::SAML2", "programFiles": ["lib/Net/SAML2/Protocol/Assertion.pm", "lib/Net/SAML2/Binding/POST.pm"], "programRoutines": [{"name": "Net::SAML2::Protocol::Assertion::new_from_xml"}, {"name": "Net::SAML2::Binding::POST::handle_response"}], "repo": "https://github.com/perl-net-saml2/perl-Net-SAML2", "vendor": "TIMLEGGE", "versions": [{"lessThan": "0.86", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "Net::SAML2 versions before 0.86 for Perl allow SAML authentication bypass via XML signature wrapping because new_from_xml reads assertion identity with document-wide XPath instead of the signed subtree.\n\nnew_from_xml reads the NameID, attribute values, SessionIndex, audience and other identity fields with document-wide XPath, such as //saml:Assertion/saml:AttributeStatement/saml:Attribute and //saml:Subject/saml:NameID, which select the first matching element in document order rather than the element covered by the verified signature. handle_response confirms that a signature is present and, when a cacert is configured, that it chains to the CA, but XML::Sig verifies only the element named by the signature's Reference URI, so unsigned sibling assertions in the same document are not covered. An attacker who holds any one IdP-signed assertion can add an unsigned attacker-authored assertion earlier in document order; the signature still verifies and the document-order XPath returns the attacker's NameID and attributes.\n\nAny caller that passes an untrusted Response to new_from_xml can accept identity fields from an assertion the IdP never signed, even when a cacert trust anchor is configured, so a party holding one valid IdP-signed assertion can authenticate as an arbitrary user."}], "impacts": [{"capecId": "CAPEC-115", "descriptions": [{"lang": "en", "value": "CAPEC-115 Authentication Bypass"}]}], "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": "2026-08-03T13:24:52.137Z"}, "references": [{"tags": ["release-notes"], "url": "https://metacpan.org/release/TIMLEGGE/Net-SAML2-0.86/changes"}, {"tags": ["patch"], "url": "https://github.com/perl-net-saml2/perl-Net-SAML2/commit/201fead7f42b83f40c84bf4a311a25b09acd18f9.patch"}], "solutions": [{"lang": "en", "value": "Upgrade to Net::SAML2 0.86 or later, which anchors identity extraction at the assertion subtree covered by a signature that validates against the configured trust anchor."}], "source": {"discovery": "UNKNOWN"}, "title": "Net::SAML2 versions before 0.86 for Perl allow SAML authentication bypass via XML signature wrapping because new_from_xml reads assertion identity with document-wide XPath instead of the signed subtree", "x_generator": {"engine": "cpansec-cna-tool 0.1"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,0.86)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Net::SAML2", "source": "cna", "vendor": "TIMLEGGE"}, "product": "net::saml2", "vendor": "timlegge"}], "created": "2026-08-03T15:51:29.388855+00:00", "updated": "2026-08-03T15:51:29.388912+00:00", "vendors": ["timlegge", "timlegge$PRODUCT$net::saml2"]}