{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-76827", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-08-19T19:55:53.101Z", "datePublished": "2026-08-19T20:56:17.608Z", "dateUpdated": "2026-08-19T20:56:17.608Z"}, "containers": {"cna": {"title": "Search-indexer: search-indexer: update/delete operations not scoped to caller's cluster (cross-tenant data tampering)", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster's prefix."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhacm2/acm-search-indexer-rhel9", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:acm:2"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-76827", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519896", "name": "RHBZ#2519896", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-08-19T20:02:11.692Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-693", "description": "Protection Mechanism Failure", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-693: Protection Mechanism Failure", "workarounds": [{"lang": "en", "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."}], "timeline": [{"lang": "en", "time": "2026-08-19T19:36:45.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-08-19T20:02:11.692Z", "value": "Made public."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-08-19T20:56:17.608Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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{"affected": [{"affectedData": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:acm:2"], "defaultStatus": "affected", "packageName": "rhacm2/acm-search-indexer-rhel9", "product": "Red Hat Advanced Cluster Management for Kubernetes 2", "vendor": "Red Hat"}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster's prefix."}], "id": "CVE-2026-76827", "lastModified": "2026-08-19T21:17:39.227", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 4.0, "source": "[email protected]", "type": "Primary"}]}, "published": "2026-08-19T21:17:39.227", "references": [{"source": "[email protected]", "url": "https://access.redhat.com/security/cve/CVE-2026-76827"}, {"source": "[email protected]", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519896"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-693"}], "source": "[email protected]", "type": "Primary"}]}

{"bugzilla": {"description": "search-indexer: search-indexer: UPDATE/DELETE operations not scoped to caller's cluster (cross-tenant data tampering)", "id": "2519896", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519896"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-693", "details": ["A flaw was found in search-indexer. This vulnerability allows a registered and authenticated managed cluster to tamper with or delete another cluster's indexed search data. This is possible because the delta-sync write paths in search-indexer do not properly restrict UPDATE/DELETE operations to data owned by the calling cluster. An attacker could exploit this by crafting specific user identifiers (UIDs) with a different cluster's prefix."], "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-2026-76827", "package_state": [{"cpe": "cpe:/a:redhat:acm:2", "fix_state": "Affected", "package_name": "rhacm2/acm-search-indexer-rhel9", "product_name": "Red Hat Advanced Cluster Management for Kubernetes 2"}], "public_date": "2026-08-19T20:02:11Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-76827\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-76827"], "statement": "This is a Moderate flaw in Red Hat Advanced Cluster Management for Kubernetes. The search-indexer's delta-sync write paths do not scope UPDATE/DELETE operations to the calling cluster, allowing a registered managed cluster to tamper with or delete another cluster's indexed search data by crafting UIDs with a different cluster's prefix. Exploitation requires already holding legitimate, authenticated managed-cluster credentials, which is why this does not reach Important severity.", "threat_severity": "Moderate"}

{}