Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M
CVE-2026-48050Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CPU-burn DoS
High 8.8
In plain English
A high-severity information exposure in arc from Basekick-Labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/basekick-labs/arc | 0.0.0-20260520170331-32a4091fb949 | GHSA-j93g-rp6m-j32m |
| Go | github.com/basekick-labs/arc | 0.0.0-20260520170331-32a4091fb949 | GO-2026-5457 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Basekick-Labs | arc | < 26.06.1 |
Weakness: CWE-200, CWE-306, CWE-400 · 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