Basekick-Labs Arc up to 26.06.0 Auth Middleware internal/api/server.go pprof.New missing authentication

Summaryinfo

A vulnerability described as critical has been identified in Basekick-Labs Arc up to 26.06.0. This issue affects the function pprof.New of the file internal/api/server.go of the component Auth Middleware. The manipulation results in missing authentication. This vulnerability is identified as CVE-2026-48050. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Basekick-Labs Arc up to 26.06.0. Affected is the function pprof.New of the file internal/api/server.go of the component Auth Middleware. The manipulation with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-48050 since 05/20/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 342404 (Linux Distros Unpatched Vulnerability : CVE-2026-48050), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.06.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (342404). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Basekick-Labs

Name

• Arc

Version

• 26.06

Website

• Product: https://github.com/Basekick-Labs/arc/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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