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

{
  "id": "0355b667686027add2cde9a180d6d44e0080632b78609669054a5cd19349ed86",
  "url": "https://osv.dev/vulnerability/CVE-2026-48050",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CPU-burn DoS",
    "summary": "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.",
    "evidence": "osv:CVE-2026-48050",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-48050",
      "aliases": [
        "CVE-2026-48050",
        "GHSA-j93g-rp6m-j32m",
        "GO-2026-5457"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/basekick-labs/arc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8038f6f80f77bb48dbaa220e7415957be3988eff"
                },
                {
                  "fixed": "32a4091fb949f9cf060cdd804a07f6450dc426a8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "26.06.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "32a4091fb949f9cf060cdd804a07f6450dc426a8"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8038f6f80f77bb48dbaa220e7415957be3988eff"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v26.06.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v26.05.1",
            "v26.04.1",
            "v26.03.2",
            "v26.03.1",
            "v26.02.2",
            "v26.02.1",
            "v26.01.2",
            "v26.01.1",
            "v25.12.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48050.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:43.103902061Z",
      "provider": "osv",
      "references": [
        "https://github.com/Basekick-Labs/arc/releases/tag/v26.06.1",
        "https://github.com/Basekick-Labs/arc/security/advisories/GHSA-j93g-rp6m-j32m",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48050.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-48050",
        "https://github.com/Basekick-Labs/arc/commit/32a4091fb949f9cf060cdd804a07f6450dc426a8"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200",
          "CWE-306",
          "CWE-400"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48050.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-48050",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510927,
  "published_at": "2026-08-21T22:40:12.771+00:00"
}