Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

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.

Arc 是一个面向遥测数据、开源且原生支持 SQL 的时序数据库。在 26.06.1 版本之前，Arc 的用户 SQL 验证器（位于 ）仅通过正则表达式黑名单机制阻止了 和 函数调用。然而，更广泛的 DuckDB I/O 函数家族（包括 、 、 、 、 、 、 、 、 、 等）并未受到阻止。此外，基于角色的访问控制（RBAC）中的表引用提取逻辑仅检查 和 子句，导致位于 列表中的标量表函数绕过了这两层防护。 该问题已在 26.06.1 版本中修复，具体通过在 DuckDB 层引入结构化沙箱机制实现。加固后，Duck

CVSS 7.1 · High EPSS 0.29% · P22

Affected Version Matrix 1

VendorProduct Version RangeStatus
Basekick-Labs arc < 2026.06.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-47735

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

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

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 Premium
Qwen3.6-35B-A3B · 5606 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-47735

请登录查看更多情报信息。

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

No comments yet

Leave a comment