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CVE-2026-48105— Arc Enterprise cluster FSM applyRegisterFile accepts arbitrary file paths without validation, enabling cluster-wide path-traversal worm primitive

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的开源、原生支持 SQL 的时间序列数据库。在版本 26.06.1 之前，Arc Enterprise 的 Raft 有限状态机（Raft FSM，代码位于 ）在处理 manifest-registration（清单注册）提议时，会接受攻击者指定的文件路径，且未对其与配置的存储后端进行任何验证。当时唯一的检查仅是确保路径非空。该实现存在以下安全缺陷：未拒绝包含父目录回溯（ ）的路径、未设置合法前缀的白名单、未限制存储协议（例如混淆 与本地文件系统路径），以及未对路径长度施加限制。该问题已在

CVSS 8.3 · High EPSS 0.17% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
Basekick-Labs arc < 2026.06.1 affected
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I. Basic Information for CVE-2026-48105

Vulnerability Information
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Vulnerability Title
Arc Enterprise cluster FSM applyRegisterFile accepts arbitrary file paths without validation, enabling cluster-wide path-traversal worm primitive
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 Enterprise's Raft FSM (`internal/cluster/raft/fsm.go:applyRegisterFile`) accepts attacker-chosen file paths in manifest-registration proposals without validating them against the configured storage backend. The only check is that the path is non-empty. There is no parent-traversal (`..`) rejection, no allowlist of legitimate prefixes, no scheme restriction (`s3://` vs local), and no length bound. This is fixed in 2026.06.1. Some workarounds are available. Restrict cluster network access to known-trusted peers via strict firewall rules, audit the cluster manifest for unexpected paths (any path not matching the configured storage backend root is suspect), and/or disable cluster mode until the fix is available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/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-2026-48105

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9932 chars
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III. Intelligence Information for CVE-2026-48105

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Vendor Advisories for CVE-2026-48105 (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-2026-48106 8.3 HIGH Arc Enterprise cluster replication accepts unauthenticated MsgReplicateSync messages, enab
CVE-2026-47735 7.1 HIGH Arc has an authenticated arbitrary local-file read via DuckDB I/O functions that bypasses

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-48105

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