CVE-2026-12423

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Because a host actively undergoing provisioning has an unexpired token in the database, the server's valid_host_token? method evaluates to true, granting access to the kickstart template even if the requester provides no token at all in the URL."}], "id": "CVE-2026-12423", "lastModified": "2026-10-08T13:16:40.427", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-12423", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-01T17:36:22.572043Z", "version": "2.0.3"}}]}, "published": "2026-10-01T17:17:19.887", "references": [{"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:74503"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:74504"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:74505"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:74506"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-12423"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488956"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2026/10/07/10"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-306"}], "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_utils:6.16::el8", "package": "foreman-0:3.12.0.23-1.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_utils:6.16::el9", "package": "foreman-0:3.12.0.23-1.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_utils:6.18::el9", "package": "foreman-0:3.16.0.25-1.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_utils:6.19::el9", "package": "foreman-0:3.18.0.14-1.el9sat", "product_name": "Red Hat Satellite 6.19 for RHEL 9", "release_date": "2026-10-01T00:00:00Z"}], "bugzilla": {"description": "foreman: unauthenticated information disclosure via provisioning token validation flaw", "id": "2488956", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488956"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "status": "verified"}, "cwe": "CWE-306", "details": ["A flaw was found in Foreman. The Red Hat Satellite /unattended/provision API endpoint is vulnerable to an authentication bypass due to a semantic logic flaw in host_verifier.rb. The application verifies the database state of a provisioning token rather than its actual presence in the incoming HTTP request. Because a host actively undergoing provisioning has an unexpired token in the database, the server's valid_host_token? method evaluates to true, granting access to the kickstart template even if the requester provides no token at all in the URL."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2026-12423", "package_state": [{"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "satellite:el8/foreman", "product_name": "Red Hat Satellite 6"}], "public_date": "2026-10-01T12:20:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-12423\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-12423"], "statement": "Successful exploitation of this issue allows an an unauthenticated remote attacker to actively poll the endpoint for a host entering a build state and extract its complete provisioning template. These templates contain highly sensitive data, including the root user's SHA-512 password hash, internal IP topography and active API build tokens.\nNote about the fix of this vulnerability:\nProvisioning tokens are now required for all operating system entries with Red Hat family set. Attempts to download an unattended template without valid token will lead to \"a provisioning token is required but a valid one was not provided\" error.\nThis changed behavior will lead to inability to use Generic or Subnet Bootdisks, systems using this bootdiks will be not matched with the host entry and not boot. To use Bootdisk after applying the errata, either use Full Host Bootdisk which uses tokens, or set Administer - Settings - Provisioning - Installation token lifetime to zero. This turns off the token enforcement and allows unauthenticated parties to use arbitrary MAC addresses in unattended requests to fetch provisioning kickstart with possibly sensitive data.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "satellite", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 91.0, "source": "matching"}]}, "original": {"product": "Red Hat Satellite 6", "source": "cna", "vendor": "Red Hat"}, "product": "foreman", "vendor": "theforeman"}], "created": "2026-10-01T18:00:08.268407+00:00", "updated": "2026-10-04T20:45:08.435065+00:00", "vendors": ["redhat", "redhat$PRODUCT$satellite", "theforeman", "theforeman$PRODUCT$foreman"]}