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CVE-2026-48050— Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CPU-burn DoS

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 是一款面向遥测数据的开源、原生 SQL 时序数据库。在 26.06.1 之前的版本中，Arc 通过在 中使用 注册了 Go 的 处理器，并挂载于 路径下；同时， 被添加至 中的 （公开前缀）列表。由于认证中间件在匹配前缀后会提前短路（即跳过令牌验证），导致这些端点无需任何身份认证即可直接访问。 26.06.1 版本已包含修复补丁。此外，用户还可采取以下临时缓解措施： 在 Arc 前端配置反向代理或负载均衡器，拦截并阻止对 路径的访问； 通过防火墙规则，将 Arc 的 API 端口限制为仅允许可信网络访问；

CVSS 8.8 · High EPSS 0.36% · P29

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token

Affected Version Matrix 1

VendorProduct Version RangeStatus
Basekick-Labs arc < 26.06.1 affected
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I. Basic Information for CVE-2026-48050

Vulnerability Information
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Vulnerability Title
Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CPU-burn DoS
Source: CVE Program / CVE List V5
Vulnerability Description
Arc is an open, SQL-native time-series database for telemetry. Versions prior to 26.06.1 register Go's `net/http/pprof` handlers at `/debug/pprof/*` via `app.Use(pprof.New())` in `internal/api/server.go`, and `/debug/pprof` is added to `PublicPrefixes` in `cmd/arc/main.go`. The auth middleware short-circuits before the token check on prefix match, so the endpoints are reachable without any authentication. Version 26.06.1 contains a patch. Some workarounds are available. Block `/debug/pprof*` at a reverse proxy / load balancer in front of Arc, restrict Arc's API port to known-trusted networks via firewall rules, and/or patch the running build: comment out `app.Use(pprof.New())` in `internal/api/server.go` and rebuild.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Basekick-Labs arc < 26.06.1 -

II. Public POCs for CVE-2026-48050

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9498 chars
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III. Intelligence Information for CVE-2026-48050

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Vendor Advisories for CVE-2026-48050 (1)

Vendor Pages for CVE-2026-48050 (1)

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

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
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-200

V. Comments for CVE-2026-48050

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