{"metadata": {"vulnerability": "CVE-2026-55098", "count": 14, "kinds": {"milestone": 4, "sighting": 2, "kev": 0, "other": 8}}, "data": [{"timestamp": "2026-06-16T14:41:54.579Z", "date_only": false, "value": "2026-06-16T14:41:54.579Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-55098", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-06-25T22:00:40Z", "date_only": false, "value": "2026-06-25T22:00:40.000000Z", "kind": "sighting", "label": "Published proof of concept", "source": "https://github.com/Basekick-Labs/arc/security/advisories/GHSA-93cm-2v4m-c56c", "record": "CVE-2026-55098", "field": "creation_timestamp", "uuid": "4c0efbd1-95a3-43d7-a073-4703dda3c86b", "url": "https://github.com/Basekick-Labs/arc/security/advisories/GHSA-93cm-2v4m-c56c", "metric_role": "exploit_publication", "metric_basis": "sighting_report"}, {"timestamp": "2026-10-30T20:09:04.909Z", "date_only": false, "value": "2026-10-30T20:09:04.909Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-55098", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-30T20:09:04.909Z", "date_only": false, "value": "2026-10-30T20:09:04.909Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / GitHub_M", "record": "CVE-2026-55098", "field": "containers.cna.providerMetadata.dateUpdated"}, {"timestamp": "2026-10-30T20:17:09Z", "date_only": false, "value": "2026-10-30T20:17:09Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-93CM-2V4M-C56C", "record": "GHSA-93CM-2V4M-C56C", "field": "database_specific.nvd_published_at", "linked_record": true}, {"timestamp": "2026-10-30T20:17:09.773Z", "date_only": false, "value": "2026-10-30T20:17:09.773", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-55098", "record": "FKIE_CVE-2026-55098", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-11-02T15:00:24.385Z", "date_only": false, "value": "2026-11-02T15:00:24.385666Z", "kind": "other", "label": "Recorded", "source": "cvelistv5 / CISA-ADP", "record": "CVE-2026-55098", "field": "containers.adp.0.metrics.0.other.content.timestamp"}, {"timestamp": "2026-11-02T15:00:24.385Z", "date_only": false, "value": "2026-11-02T15:00:24.385666Z", "kind": "other", "label": "Recorded", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-55098", "record": "FKIE_CVE-2026-55098", "field": "metrics.ssvcV203.0.ssvcData.timestamp", "linked_record": true}, {"timestamp": "2026-11-02T15:00:56.869Z", "date_only": false, "value": "2026-11-02T15:00:56.869Z", "kind": "other", "label": "Updated", "source": "cvelistv5", "record": "CVE-2026-55098", "field": "cveMetadata.dateUpdated"}, {"timestamp": "2026-11-02T15:00:56.869Z", "date_only": false, "value": "2026-11-02T15:00:56.869Z", "kind": "other", "label": "Updated", "source": "cvelistv5 / CISA-ADP", "record": "CVE-2026-55098", "field": "containers.adp.0.providerMetadata.dateUpdated"}, {"timestamp": "2026-11-02T19:35:33.347Z", "date_only": false, "value": "2026-11-02T19:35:33.347", "kind": "other", "label": "Updated", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-55098", "record": "FKIE_CVE-2026-55098", "field": "lastModified", "linked_record": true}, {"timestamp": "2026-11-04T17:02:37Z", "date_only": false, "value": "2026-11-04T17:02:37Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-93CM-2V4M-C56C", "record": "GHSA-93CM-2V4M-C56C", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-11-04T17:02:37Z", "date_only": false, "value": "2026-11-04T17:02:37Z", "kind": "other", "label": "Updated", "source": "github \u00b7 GHSA-93CM-2V4M-C56C", "record": "GHSA-93CM-2V4M-C56C", "field": "modified", "linked_record": true}, {"timestamp": "2026-11-04T18:30:52Z", "date_only": false, "value": "2026-11-04T18:30:52.000000Z", "kind": "sighting", "label": "Seen", "source": "https://gist.github.com/alon710/83fbea8abb11297b233b012a612d755a", "record": "CVE-2026-55098", "field": "creation_timestamp", "uuid": "5b0dfa9f-9929-45eb-8d68-75561087cc3f", "content": "# CVE-2026-55098: CVE-2026-55098: Cross-Database Authorization Bypass via DuckDB Table-Valued I/O Functions in Basekick-Labs Arc\n\n> **CVSS Score:** 6.5\n> **Published:** 2026-11-04\n> **Full Report:** https://cvereports.com/reports/CVE-2026-55098\n\n## Summary\nCVE-2026-55098 (GHSA-93cm-2v4m-c56c) is an authorization bypass and sensitive information disclosure vulnerability in Basekick-Labs Arc prior to version 26.06.2. The flaw stems from an incomplete remediation of CVE-2026-47735, which failed to restrict the full suite of DuckDB table-valued filesystem I/O functions and quoted-identifier invocations. Because Arc's query parser ignores function calls during table reference extraction, authenticated users with minimal or empty permissions can invoke functions like parquet_scan(), glob(), and read_blob() to read, enumerate, and extract telemetry data across all tenant databases residing within the shared local storage root.\n\n## TL;DR\nAn incomplete denylist in Basekick-Labs Arc prior to v26.06.2 allows any authenticated user to bypass database-level RBAC by invoking unblocked DuckDB filesystem I/O functions (such as parquet_scan and glob) or quoted identifiers, enabling full read access to all tenant databases in the shared storage directory.\n\n## Exploit Status: POC\n\n## Technical Details\n\n- **Vulnerability Type**: Incorrect Authorization / Cross-Tenant Data Disclosure (CWE-863, CWE-200)\n- **Affected Component**: SQL Query Validator (internal/api/query.go) & Token Auth (internal/auth/auth.go)\n- **Attack Vector**: Network via authenticated HTTP POST to /api/v1/query\n- **CVSS v3.1 Score**: 6.5 Medium (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)\n- **EPSS Score**: 0.319% (25.03rd Percentile)\n- **Impact**: Unauthorized read access and directory enumeration across all tenant databases in cfg.LocalStorageRoot\n- **Exploit Status**: Proof-of-Concept available in repository test suite\n- **Fixed Version**: Arc v26.06.2\n\n## Affected Systems\n\n- Basekick-Labs Arc\n- **Arc**: < 26.06.2 (Fixed in: `26.06.2`)\n\n## Mitigation\n\n- Upgrade Basekick-Labs Arc to version 26.06.2 or later to enforce the comprehensive DuckDB I/O function denylist and proper quote normalization.\n- Audit and rotate API tokens created with empty permission arrays ('permissions': []) prior to v26.06.2, as they were silently granted 'read,write' access.\n- Deploy Web Application Firewall (WAF) or reverse proxy rules to inspect POST /api/v1/query payloads and reject requests containing DuckDB filesystem table functions.\n- Isolate sensitive tenants into separate Arc instances with dedicated local storage directories where strict multi-tenant physical separation is required.\n\n**Remediation Steps:**\n1. Pull and deploy the Basekick-Labs Arc v26.06.2 release binary or container image (containing commit 5dc8f53b70a3871b16b0cebf328f07c578af7a45).\n2. Inspect the authentication token database to identify tokens intended to be RBAC-only that currently possess 'read,write' permissions, and recreate or revoke them.\n3. Verify that user SQL queries invoking parquet_scan(), glob(), read_blob(), or quoted variants return a SQLValidationError.\n\n## References\n\n- [GitHub Security Advisory GHSA-93cm-2v4m-c56c](https://github.com/Basekick-Labs/arc/security/advisories/GHSA-93cm-2v4m-c56c)\n- [Fix Commit 5dc8f53b70a3871b16b0cebf328f07c578af7a45](https://github.com/Basekick-Labs/arc/commit/5dc8f53b70a3871b16b0cebf328f07c578af7a45)\n- [Basekick-Labs Arc Pull Request #495](https://github.com/Basekick-Labs/arc/pull/495)\n- [Basekick-Labs Arc v26.06.2 Release Tag](https://github.com/Basekick-Labs/arc/tree/v26.06.2)\n- [NVD Detail for CVE-2026-55098](https://nvd.nist.gov/vuln/detail/CVE-2026-55098)\n- [CVE.org Record for CVE-2026-55098](https://www.cve.org/CVERecord?id=CVE-2026-55098)\n- [CVEListV5 JSON Record for CVE-2026-55098](https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55098.json)\n\n\n---\n*Generated by [CVEReports](https://cvereports.com/reports/CVE-2026-55098) - Automated 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