CVE-2026-48050 Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CPU-burn DoS
Unauthenticated access to Arc database debug endpoints allows attackers to leak runtime state and cause denial of service via CPU exhaustion.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48050?
CVE-2026-48050 is a high-severity vulnerability in Basekick-Labs arc, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-48050?
3 open source packages ship an affected version, including github.com/basekick-labs/arc.
| Package | Affected | Fixed in |
|---|---|---|
github.com/basekick-labs/arc Go | All versions | 0.0.0-20260520170331-32a4091fb949 |
github.com/basekick-labs/arc Go | All versions | 0.0.0-20260520170331-32a4091fb949 |
github.com/basekick-labs/arc Go | All versions | 0.0.0-20260520170331-32a4091fb949 |
How do I fix CVE-2026-48050?
Upgrade github.com/basekick-labs/arc to 0.0.0-20260520170331-32a4091fb949 or later.
Is CVE-2026-48050 being exploited?
There is no known exploitation of CVE-2026-48050 in the wild and no public exploit code.
Sources
Also known as GHSA-j93g-rp6m-j32m, GO-2026-5457.