{"id":"CVE-2026-47735","revision":null,"records":[{"revision":"06ad6c87677749669f5d5cc5c93b2aa4","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-47735","aliases":[],"title":"Arc has an authenticated arbitrary local-file read via DuckDB I/O functions that bypasses RBAC table-level checks","description":"Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc's user-SQL validator (`internal/api/query.go:ValidateSQLRequest`) blocked only `read_parquet(` and `arc_partition_agg(` via regex denylist. The broader DuckDB I/O function family — `read_csv_auto`, `read_csv`, `read_json`, `read_json_auto`, `read_text`, `read_blob`, `glob`, `parquet_metadata`, `parquet_schema`, `read_xlsx`, etc. — was not blocked. RBAC table-reference extraction inspected only `FROM`/`JOIN` clauses, so scalar table functions in the `SELECT` list slipped past both layers. This is fixed in 2026.06.1 via a structural sandbox at the DuckDB layer. After lockdown, DuckDB refuses to open any file outside the allowlist and refuses further `INSTALL`/`LOAD`. Already-loaded extensions remain callable. Some workarounds are available. Restrict API access to known-trusted networks via firewall rules or, as a temporary mitigation, add `read_csv*`/`read_json*`/`glob` etc. to `dangerousSQLPattern` in `internal/api/query.go`.","state":0,"publishedAt":"2026-08-21T22:42:55.886+00:00","modifiedAt":"2026-08-25T13:35:54.838+00:00","affected":[{"ecosystem":"Vendor product","name":"arc","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Basekick-Labs\",\n                    \"product\": \"arc\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2026.06.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":7.1,"severity":"HIGH"}],"references":["https://github.com/Basekick-Labs/arc/security/advisories/GHSA-p2j4-c4g6-rpf5","https://github.com/Basekick-Labs/arc/pull/442","https://github.com/Basekick-Labs/arc/commit/91bdc29d1a02178ccf8c66375eccf85203108dfb","https://github.com/Basekick-Labs/arc/releases/tag/v26.06.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-47735","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-47735","identifiers":["CVE-2026-47735"]},"retained":false,"historicalAffected":[]},{"revision":"1b2cc7b7b54a4093917a79ca6ab46018","observedAt":"2026-11-09T12:03:15.329+00:00","statement":{"source":"euvd","id":"EUVD-2026-64191","aliases":["CVE-2026-47735","GHSA-p2j4-c4g6-rpf5"],"title":"Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc's user-SQL validator (`internal/api/query.go:ValidateSQLRequest`) blocked only `read_parquet(` and `arc_partition_agg(` via regex denylist. The bro…","description":"Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc's user-SQL validator (`internal/api/query.go:ValidateSQLRequest`) blocked only `read_parquet(` and `arc_partition_agg(` via regex denylist. The broader DuckDB I/O function family — `read_csv_auto`, `read_csv`, `read_json`, `read_json_auto`, `read_text`, `read_blob`, `glob`, `parquet_metadata`, `parquet_schema`, `read_xlsx`, etc. — was not blocked. RBAC table-reference extraction inspected only `FROM`/`JOIN` clauses, so scalar table functions in the `SELECT` list slipped past both layers. This is fixed in 2026.06.1 via a structural sandbox at the DuckDB layer. After lockdown, DuckDB refuses to open any file outside the allowlist and refuses further `INSTALL`/`LOAD`. Already-loaded extensions remain callable. Some workarounds are available. Restrict API access to known-trusted networks via firewall rules or, as a temporary mitigation, add `read_csv*`/`read_json*`/`glob` etc. to `dangerousSQLPattern` in `internal/api/query.go`.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":7.1,"severity":null}],"references":["https://github.com/Basekick-Labs/arc/security/advisories/GHSA-p2j4-c4g6-rpf5","https://github.com/Basekick-Labs/arc/pull/442","https://github.com/Basekick-Labs/arc/commit/91bdc29d1a02178ccf8c66375eccf85203108dfb","https://github.com/Basekick-Labs/arc/releases/tag/v26.06.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-64191","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 21, 2026, 10:42:55 PM","dateUpdated":"Aug 25, 2026, 1:35:54 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-64191","identifiers":["EUVD-2026-64191","CVE-2026-47735","GHSA-p2j4-c4g6-rpf5"]},"retained":false,"historicalAffected":[]},{"revision":"c8ea69debb9f4d2084c4a7a78bcbbdf7","observedAt":"2026-10-25T12:17:26.301+00:00","statement":{"source":"nvd","id":"CVE-2026-47735","aliases":[],"title":"Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc's user-SQL validator (`internal/api/query.go:ValidateSQLRequest`) blocked only `read_parquet(` and `arc_partition_agg(` via regex denylist. The bro…","description":"Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc's user-SQL validator (`internal/api/query.go:ValidateSQLRequest`) blocked only `read_parquet(` and `arc_partition_agg(` via regex denylist. The broader DuckDB I/O function family — `read_csv_auto`, `read_csv`, `read_json`, `read_json_auto`, `read_text`, `read_blob`, `glob`, `parquet_metadata`, `parquet_schema`, `read_xlsx`, etc. — was not blocked. RBAC table-reference extraction inspected only `FROM`/`JOIN` clauses, so scalar table functions in the `SELECT` list slipped past both layers. This is fixed in 2026.06.1 via a structural sandbox at the DuckDB layer. After lockdown, DuckDB refuses to open any file outside the allowlist and refuses further `INSTALL`/`LOAD`. Already-loaded extensions remain callable. Some workarounds are available. Restrict API access to known-trusted networks via firewall rules or, as a temporary mitigation, add `read_csv*`/`read_json*`/`glob` etc. to `dangerousSQLPattern` in `internal/api/query.go`.","state":0,"publishedAt":"2026-08-21T23:16:24.917+00:00","modifiedAt":"2026-10-12T16:10:00.22+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7.1,"severity":"HIGH"}],"references":["https://github.com/Basekick-Labs/arc/commit/91bdc29d1a02178ccf8c66375eccf85203108dfb","https://github.com/Basekick-Labs/arc/pull/442","https://github.com/Basekick-Labs/arc/releases/tag/v26.06.1","https://github.com/Basekick-Labs/arc/security/advisories/GHSA-p2j4-c4g6-rpf5"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-47735","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-22","CWE-200","CWE-918"],"productCriteria":[],"sourceDates":{"published":"2026-08-21T23:16:24.917","lastModified":"2026-10-12T16:10:00.220"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-47735","identifiers":["CVE-2026-47735"]},"retained":false,"historicalAffected":[]},{"revision":"86198acff25840d3b60ed3bca446f78a","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-p2j4-c4g6-rpf5","aliases":["CVE-2026-47735","GO-2026-5523"],"title":"Arc has an authenticated arbitrary local-file read via DuckDB I/O functions that bypasses RBAC table-level checks","description":"### Summary\n\nArc's user-SQL validator (`internal/api/query.go:ValidateSQLRequest`) blocked only `read_parquet(` and `arc_partition_agg(` via regex denylist. The broader DuckDB I/O function family — `read_csv_auto`, `read_csv`, `read_json`, `read_json_auto`, `read_text`, `read_blob`, `glob`, `parquet_metadata`, `parquet_schema`, `read_xlsx`, etc. — was not blocked. RBAC table-reference extraction inspected only `FROM`/`JOIN` clauses, so scalar table functions in the `SELECT` list slipped past both layers.\n\n### Impact\n\nAny authenticated user, including a token with `permissions: []`, can read arbitrary local files via:\n\n```\nPOST /api/v1/query\nAuthorization: Bearer <token>\n{\"sql\": \"SELECT * FROM read_csv_auto('/etc/passwd', header=false, columns={'l':'VARCHAR'}) LIMIT 5\"}\n```\n\nConfirmed reachable targets:\n\n- `auth.db` — bcrypt hashes for every API token, plus legacy SHA-256 rows.\n- `arc.toml` — S3 secrets, TLS keys.\n- `/proc/self/environ` — environment-variable secrets.\n- Cross-tenant Parquet files — bypasses RBAC because the tenant scope is enforced at the table layer, not on raw file paths.\n- SSRF when `httpfs` is loaded (any S3-backed deployment) — `read_csv_auto('http://169.254.169.254/latest/meta-data/...')` reaches instance metadata IPs.\n\n### Patches\n\nFixed in 2026.06.1 (PR #442) via a structural sandbox at the DuckDB layer:\n\n1. `SET GLOBAL allowed_directories = [...]` enumerates Arc's legitimate filesystem prefixes (storage roots + tier prefixes + import upload dir + compaction temp).\n2. `SET GLOBAL enable_external_access = false` (one-way at runtime).\n3. Verified by reading back the flag.\n\nAfter lockdown, DuckDB refuses to open any file outside the allowlist and refuses further `INSTALL`/`LOAD`. Already-loaded extensions remain callable.\n\n### Workarounds\n\n- Restrict API access to known-trusted networks via firewall rules.\n- Temporary mitigation: add `read_csv*`/`read_json*`/`glob` etc. to `dangerousSQLPattern` in `internal/api/query.go` pending 2026.06.1.\n\n### Credits\n\nReported by Alex Manson ([@NeuroWinter](https://github.com/NeuroWinter), https://neurowinter.com/) on 2026-05-19.","state":0,"publishedAt":"2026-06-08T23:51:19+00:00","modifiedAt":"2026-06-25T23:11:18.501045+00:00","affected":[{"ecosystem":"Go","name":"github.com/basekick-labs/arc","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260520141557-91bdc29d1a02"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/Basekick-Labs/arc/security/advisories/GHSA-p2j4-c4g6-rpf5","https://github.com/Basekick-Labs/arc/pull/442","https://github.com/Basekick-Labs/arc/commit/91bdc29d1a02178ccf8c66375eccf85203108dfb","https://github.com/Basekick-Labs/arc"],"sourceUrl":"https://github.com/advisories/GHSA-p2j4-c4g6-rpf5","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-p2j4-c4g6-rpf5","identifiers":["GHSA-p2j4-c4g6-rpf5","CVE-2026-47735","GO-2026-5523"]},"retained":false,"historicalAffected":[]},{"revision":"882f9c9771e448868082e5a70d8ac9af","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5523","aliases":["CVE-2026-47735","GHSA-p2j4-c4g6-rpf5"],"title":"Arc has an authenticated arbitrary local-file read via DuckDB I/O functions that bypasses RBAC table-level checks in github.com/basekick-labs/arc","description":"Arc has an authenticated arbitrary local-file read via DuckDB I/O functions that bypasses RBAC table-level checks in github.com/basekick-labs/arc","state":0,"publishedAt":"2026-06-25T22:34:34+00:00","modifiedAt":"2026-06-25T23:01:19.2331353+00:00","affected":[{"ecosystem":"Go","name":"github.com/basekick-labs/arc","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"0.0.0-20260520141557-91bdc29d1a02"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/Basekick-Labs/arc/security/advisories/GHSA-p2j4-c4g6-rpf5","https://github.com/Basekick-Labs/arc/commit/91bdc29d1a02178ccf8c66375eccf85203108dfb","https://github.com/Basekick-Labs/arc/pull/442"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5523","license":"OSV · upstream source license applies","key":"osv:GO-2026-5523","identifiers":["GO-2026-5523","CVE-2026-47735","GHSA-p2j4-c4g6-rpf5"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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