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CVE-2026-47735— Arc has an authenticated arbitrary local-file read via DuckDB I/O functions that bypasses RBAC table-level checks

Quick assessment

Affected
Basekick-Labs arc
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Basekick Labs Arc是Basekick Labs组织的一款开放式、原生 SQL 的时序数据库。 Basekick Labs Arc 2026.06.1之前版本存在安全漏洞，该漏洞源于用户SQL验证器仅阻止部分DuckDB I/O函数且RBAC仅检查FROM/JOIN子句，导致SELECT列表中的标量表函数绕过限制，可能被利用读取任意文件或发起服务端请求伪造攻击。

CVSS 7.1 · High EPSS 0.43% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
Basekick-Labs arc < 2026.06.1 affected
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I. Basic Information for CVE-2026-47735

Vulnerability Information
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Vulnerability Title
Arc has an authenticated arbitrary local-file read via DuckDB I/O functions that bypasses RBAC table-level checks
Source: CVE Program / CVE List V5
Vulnerability 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`.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Basekick Labs Arc 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Basekick Labs Arc是Basekick Labs组织的一款开放式、原生 SQL 的时序数据库。 Basekick Labs Arc 2026.06.1之前版本存在安全漏洞，该漏洞源于用户SQL验证器仅阻止部分DuckDB I/O函数且RBAC仅检查FROM/JOIN子句，导致SELECT列表中的标量表函数绕过限制，可能被利用读取任意文件或发起服务端请求伪造攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Basekick-Labs arc < 2026.06.1 -

II. Public POCs for CVE-2026-47735

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: read_text(/app/flag.txt) exfiltrated PROOF_2a4fc64b9f209594 from the container filesystem via /api/v1/query
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 5606 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-47735

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Patches & Fixes for CVE-2026-47735 (1)

Vendor Advisories for CVE-2026-47735 (1)

Vendor Pages for CVE-2026-47735 (1)

Same Patch Batch · Basekick-Labs · 2026-08-21 · 4 CVEs total

CVE-2026-48050 8.8 HIGH Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CP
CVE-2026-48105 8.3 HIGH Arc Enterprise cluster FSM applyRegisterFile accepts arbitrary file paths without validati
CVE-2026-48106 8.3 HIGH Arc Enterprise cluster replication accepts unauthenticated MsgReplicateSync messages, enab

IV. Related Vulnerabilities

Same product: arc
Same vendor: Basekick-Labs
Same weakness: CWE-22

V. Comments for CVE-2026-47735

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