CVE-2026-48106
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
Summary
Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc Enterprise's cluster replication receiver at internal/cluster/replication/receiver.go validates only the wire-format envelope (length, opcode) of inbound messages. The MsgReplicateSync payload itself is accepted without any application-layer authentication — no HMAC, no signature, no per-message nonce. The replication stream is protected at the transport layer by TLS / mTLS, but there is no protection against application-layer message tampering or replay once a peer is on the cluster network. This is fixed in 2026.06.1. Some workarounds are available. Restrict cluster network access to known-trusted peers via strict firewall rules, audit replication logs for unexpected MsgReplicateSync traffic, and/or disable cluster mode until the fix is available.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Basekick-Labs | arc | < 2026.06.1 | affected |
Weaknesses
- CWE-306: CWE-306: Missing Authentication for Critical Function
- CWE-345: CWE-345: Insufficient Verification of Data Authenticity
- CWE-924: CWE-924: Improper Enforcement of Message Integrity During Transmission in a Communication Channel
References
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