# CVE-2026-48105

## Summary

- **CVE ID:** CVE-2026-48105
- **Severity:** HIGH
- **CVSS Score:** 8.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N)
- **CWE:** CWE-22, CWE-345, CWE-913
- **Published:** Aug 21, 2026
- **Last Modified:** Aug 24, 2026

## Description

Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc Enterprise's Raft FSM (`internal/cluster/raft/fsm.go:applyRegisterFile`) accepts attacker-chosen file paths in manifest-registration proposals without validating them against the configured storage backend. The only check is that the path is non-empty. There is no parent-traversal (`..`) rejection, no allowlist of legitimate prefixes, no scheme restriction (`s3://` vs local), and no length bound. This is fixed in 2026.06.1. Some workarounds are available. Restrict cluster network access to known-trusted peers via strict firewall rules, audit the cluster manifest for unexpected paths (any path not matching the configured storage backend root is suspect), and/or disable cluster mode until the fix is available.

## Affected Products

- Basekick-Labs — arc (< 2026.06.1)

## References

- [CNA](https://github.com/Basekick-Labs/arc/security/advisories/GHSA-f85q-mvg8-qf37)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 6.5

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._