CVE-2026-56098

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The RegistryProxiesController in Katello contains an authorization bypass vulnerability due to an execution fall-through in the registry_authorize filter. While the application identifies unauthorized requests and triggers an error response via the unauthorized method, it fails to halt the execution of the current code path (missing return statement). This failure in the control flow allows the application to proceed into subsequent business logic and database validation filters. Consequently, the application reveals its internal state through differential responses, allowing an unprivileged attacker to enumerate valid Users, Organizations, and Products across the entire instance."}], "id": "CVE-2026-56098", "lastModified": "2026-10-07T07:17:01.217", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56098", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-01T18:02:50.614551Z", "version": "2.0.3"}}]}, "published": "2026-10-01T18:17:19.763", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:74503"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:74504"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:74505"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:74506"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-56098"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490542"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/07/3"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-203"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "This issue was discovered by Laura Pardo (Red Hat) and Toni Gornals (Red Hat).", "affected_release": [{"advisory": "RHSA-2026:74506", "cpe": "cpe:/a:redhat:satellite:6.16::el8", "package": "rubygem-katello-0:4.14.0.23-1.el8sat", "product_name": "Red Hat Satellite 6.16 for RHEL 8", "release_date": "2026-10-01T00:00:00Z"}, {"advisory": "RHSA-2026:74506", "cpe": "cpe:/a:redhat:satellite:6.16::el9", "package": "rubygem-katello-0:4.14.0.23-1.el9sat", "product_name": "Red Hat Satellite 6.16 for RHEL 9", "release_date": "2026-10-01T00:00:00Z"}, {"advisory": "RHSA-2026:74504", "cpe": "cpe:/a:redhat:satellite:6.18::el9", "package": "rubygem-katello-0:4.18.0.24-1.el9sat", "product_name": "Red Hat Satellite 6.18 for RHEL 9", "release_date": "2026-10-01T00:00:00Z"}, {"advisory": "RHSA-2026:74503", "cpe": "cpe:/a:redhat:satellite:6.19::el9", "package": "rubygem-katello-0:4.20.0.11-1.el9sat", "product_name": "Red Hat Satellite 6.19 for RHEL 9", "release_date": "2026-10-01T00:00:00Z"}], "bugzilla": {"description": "rubygem-katello: improper authorization logic allows resource enumeration", "id": "2490542", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490542"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "status": "verified"}, "cwe": "CWE-203", "details": ["A flaw was found in rubygem-katello. The RegistryProxiesController in Katello contains an authorization bypass vulnerability due to an execution fall-through in the registry_authorize filter. While the application identifies unauthorized requests and triggers an error response via the unauthorized method, it fails to halt the execution of the current code path (missing return statement). This failure in the control flow allows the application to proceed into subsequent business logic and database validation filters. Consequently, the application reveals its internal state through differential responses, allowing an unprivileged attacker to enumerate valid Users, Organizations, and Products across the entire instance."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-56098", "package_state": [{"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Fix deferred", "package_name": "katello", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "satellite:el8/rubygem-katello", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-10-01T12:20:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-56098\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-56098"], "statement": "- User enumeration: attackers can verify the existence of usernames. Invalid users cause a server-side crash (500 Internal Server Error) because the fall-through logic cannot handle a null user object. Valid users trigger a semantic error (404 NAME_UNKNOWN), confirming their presence.\n- Resource mapping: unauthorized users can map hidden organizational structures. By observing the discrepancy between \"Organization not found\" and \"Product not found\", an attacker can confirm the existence of Organizations and Products they are explicitly forbidden from viewing.\n- Exploit chain enabler: this vulnerability provides the necessary \"transport\" for CVE-2026-56097, allowing malicious payloads to reach the database layer despite failing initial authorization checks.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "Red Hat Satellite 6.19 for RHEL 9", "source": "cna", "vendor": "Red Hat"}, "product": "satellite", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "product": "katello", "vendor": "theforeman"}], "created": "2026-10-01T19:30:11.919584+00:00", "updated": "2026-10-04T20:57:49.922635+00:00", "vendors": ["redhat", "redhat$PRODUCT$satellite", "theforeman", "theforeman$PRODUCT$katello"]}