CVE-2026-55678— Arc 未认证集群节点准入漏洞
一分钟漏洞结论
影响对象
Basekick-Labs arc
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
以下是该漏洞描述的中文翻译： Arc 是一个开源的、原生支持 SQL 的时间序列数据库，专为遥测数据设计。 在 26.02.1 到 26.06.2 版本中，当 为 但未配置 时，Arc Enterprise 集群功能在接受节点加入集群的请求时不需要身份验证。 默认配置细节： 中的默认值设置如下： 为 为 为 为空值 为 同时， 仅在 为 时才要求必须配置 。 漏洞技术细节： 1. 加入请求（JoinRequest）： 中的 接受攻击者可控的字段，包括 、 、 、 和 ，以及可选的 、 和 字段。 2. 验证逻辑缺陷
获取后续新漏洞提醒
登录后订阅
一、 漏洞 CVE-2026-55678 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
查看神龙十问 ↗
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
Arc: Unauthenticated cluster node admission when `cluster.shared_secret` is unset
来源: CVE Program / CVE List V5
Vulnerability Description
Arc is an open, SQL-native time-series database for telemetry. From 26.02.1 until 26.06.2, Arc Enterprise clustering accepts cluster join requests without authentication when cluster.enabled is true but cluster.shared_secret is not configured. The defaults in internal/config/config.go set cluster.enabled to false, cluster.cluster_name to arc-cluster, cluster.coordinator_addr to :9100, cluster.shared_secret to an empty value, and cluster.tls_enabled to false, while cmd/arc/main.go requires cluster.shared_secret only when cluster.replication_enabled is true. JoinRequest in internal/cluster/protocol/messages.go accepts attacker-controlled node_id, role, raft_addr, api_addr, and coord_addr values, plus optional auth_nonce, auth_timestamp, and auth_hmac fields. The join path in internal/cluster/coordinator.go validates HMAC authentication only when the configured shared secret is non-empty and otherwise proceeds after only the cluster-name check. An accepted node is marked healthy, added as a Raft voter or registered locally, and becomes available through internal/cluster/registry.go to the routing logic in internal/cluster/router.go. The forwardRequest path in internal/cluster/router.go builds its target from node.APIAddress and copies Authorization and x-api-key headers with the request, so a rogue node selected for a forwarded query or write can receive authentication headers, request bodies, database and measurement names, and operational metadata. Heartbeat in internal/cluster/protocol/messages.go also lacks HMAC fields, and internal/cluster/coordinator.go updates node state from supplied node_id and state values without authentication. An unauthenticated network attacker who can reach the coordinator port and knows the cluster name can therefore become a trusted cluster node, mutate cluster membership, be submitted as a Raft voter, intercept topology-dependent forwarded requests, divert or forge operations, and blackhole or delay traffic. The default standalone configuration is not reachable because cluster.enabled is false, but Enterprise cluster deployments with clustering enabled and no shared secret are affected. This issue is fixed in version 26.06.2.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Basekick-Labs | arc | >= 26.02.1, < 26.06.2 | - |
|
二、漏洞 CVE-2026-55678 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-55678 的情报信息
请登录查看更多情报信息。
CVE-2026-55678 补丁与修复 (2)
CVE-2026-55678 厂商安全公告 (1)
CVE-2026-55678 厂商页面 (1)
-
🔗 Release Arc 26.06.2 · Basekick-Labs/arc · GitHub x_refsource_MISC
IV. Related Vulnerabilities
V. Comments for CVE-2026-55678
暂无评论