CVE-2026-48050
Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CPU-burn DoS
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/basekick-labs/arc | < 0.0.0-20260520170331-32a4091fb949 | 0.0.0-20260520170331-32a4091fb949 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-j93g-rp6m-j32m
- 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