CVE-2026-48106

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/Basekick-Labs/arc/security/advisories/GHSA-wfgr-8x84-22q7

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-21 23:16

Updated : 2026-09-09 21:06

NVD link : CVE-2026-48106

Mitre link : CVE-2026-48106

CVE.ORG link : CVE-2026-48106

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

CWE-345

Insufficient Verification of Data Authenticity

CWE-924

Improper Enforcement of Message Integrity During Transmission in a Communication Channel

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