{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-104056", "assignerOrgId": "37e5125f-f79b-445b-8fad-9564f167944b", "state": "PUBLISHED", "assignerShortName": "certcc", "dateReserved": "2026-10-01T18:01:19.689Z", "datePublished": "2026-10-01T18:03:27.484Z", "dateUpdated": "2026-10-01T18:03:27.484Z"}, "containers": {"cna": {"title": "CVE-2026-104056", "descriptions": [{"lang": "en", "value": "Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL."}], "source": {"discovery": "UNKNOWN"}, "affected": [{"vendor": "Authlib", "product": "Authlib", "versions": [{"status": "affected", "version": "1.7.2"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-345 Insufficient Verification of Data Authenticity"}]}, {"descriptions": [{"lang": "en", "description": "CWE-346 Origin Validation Error"}]}, {"descriptions": [{"lang": "en", "description": "CWE-829 Inclusion of Functionality from Untrusted Control Sphere"}]}], "references": [{"url": "https://uziii2208.github.io/post/cve-2026-104056/"}], "x_generator": {"engine": "VINCE 3.0.49", "env": "prod", "origin": "https://cveawg.mitre.org/api/cve/CVE-2026-104056"}, "providerMetadata": {"orgId": "37e5125f-f79b-445b-8fad-9564f167944b", "shortName": "certcc", "dateUpdated": "2026-10-01T18:03:27.484Z"}}}}

{}

{"affected": [{"affectedData": [{"product": "Authlib", "vendor": "Authlib", "versions": [{"status": "affected", "version": "1.7.2"}]}], "source": "cret@cert.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL."}], "id": "CVE-2026-104056", "lastModified": "2026-10-01T20:37:42.787", "metrics": {}, "published": "2026-10-01T19:17:19.033", "references": [{"source": "cret@cert.org", "url": "https://uziii2208.github.io/post/cve-2026-104056/"}], "sourceIdentifier": "cret@cert.org", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "authlib: authlib: Information disclosure via unvalidated discovery metadata", "id": "2544875", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544875"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-346", "details": ["A flaw was found in Authlib. The OpenID Connect (OIDC) and OAuth discovery metadata is cached without validating that returned endpoint addresses match the origin of the configured issuer. A remote attacker who supplies a malicious discovery response can replace legitimate service endpoints with attacker-controlled URLs. This flaw could allow an attacker to intercept sensitive authentication requests and credentials, resulting in information disclosure."], "name": "CVE-2026-104056", "package_state": [{"cpe": "cpe:/a:redhat:exploit_intelligence:0", "fix_state": "Out of support scope", "package_name": "exploit-intelligence/vulnerability-analysis-rhel9", "product_name": "Exploit Intelligence"}, {"cpe": "cpe:/a:redhat:lightspeed_core", "fix_state": "Fix deferred", "package_name": "lightspeed-core/lightspeed-stack-rhel9", "product_name": "Lightspeed Core"}, {"cpe": "cpe:/a:redhat:migration_toolkit_applications:8", "fix_state": "Fix deferred", "package_name": "mta/mta-solution-server-rhel9", "product_name": "Migration Toolkit for Applications 8"}, {"cpe": "cpe:/a:redhat:openshift_lightspeed", "fix_state": "Fix deferred", "package_name": "openshift-lightspeed/lightspeed-agentic-sandbox-rhel9", "product_name": "OpenShift Lightspeed"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-26/lightspeed-chatbot-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:ansible_automation_platform:2", "fix_state": "Fix deferred", "package_name": "ansible-automation-platform-27/lightspeed-chatbot-rhel9", "product_name": "Red Hat Ansible Automation Platform 2"}, {"cpe": "cpe:/a:redhat:rhel_cla:1", "fix_state": "Fix deferred", "package_name": "rhel-cla/rhel-knowledge-bridge-rhel10", "product_name": "Red Hat Enterprise Linux command line assistant"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "jaeger", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:container_native_virtualization:4", "fix_state": "Fix deferred", "package_name": "openshift-virtualization/ocp-virt-validation-checkup-rhel9", "product_name": "Red Hat OpenShift Virtualization 4"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Out of support scope", "package_name": "quay/quay-rhel8", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:quay:3", "fix_state": "Fix deferred", "package_name": "quay/quay-rhel9", "product_name": "Red Hat Quay 3"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "satellite/foreman-mcp-server-rhel9", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-10-01T18:03:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-104056\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-104056\nhttps://uziii2208.github.io/post/cve-2026-104056/"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "1.7.2"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Authlib", "source": "cna", "vendor": "Authlib"}, "product": "authlib", "vendor": "authlib"}], "created": "2026-10-01T19:30:11.486188+00:00", "title": "Authlib OIDC Discovery Response Endpoint Replacement Vulnerability", "updated": "2026-10-02T15:30:12.268162+00:00", "vendors": ["authlib", "authlib$PRODUCT$authlib"]}