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CVE-2026-55473— HomeBox: Notifier SSRF guard misses NAT64 prefixes (64:ff9b::/96, 64:ff9b:1::/48) — generic:// URL reaches cloud metadata on NAT64 egress

一分钟漏洞结论

影响对象
sysadminsmedia homebox
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。

HomeBox is a home inventory and organization system. Prior to 0.26.0, the default-on BlockBogonNets and BlockCloudMetadata notifier SSRF protections in backend/internal/sys/validate/notifier_url.go do not inspect IPv4 destinations embedded in the NAT64 prefixe

CVSS 6.0 · Medium EPSS 0.24% · P15

影响版本矩阵 1

厂商产品 版本范围状态
sysadminsmedia homebox < 0.26.0 affected
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一、 漏洞 CVE-2026-55473 基础信息

漏洞信息

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Vulnerability Title
HomeBox: Notifier SSRF guard misses NAT64 prefixes (64:ff9b::/96, 64:ff9b:1::/48) — generic:// URL reaches cloud metadata on NAT64 egress
来源: CVE Program / CVE List V5
Vulnerability Description
HomeBox is a home inventory and organization system. Prior to 0.26.0, the default-on BlockBogonNets and BlockCloudMetadata notifier SSRF protections in backend/internal/sys/validate/notifier_url.go do not inspect IPv4 destinations embedded in the NAT64 prefixes 64:ff9b::/96 and 64:ff9b:1::/48. An authenticated user can submit a generic:// notifier through POST /v1/notifiers or POST /v1/notifiers/test, and on a Homebox instance that egresses through NAT64/DNS64, the gateway can translate an accepted IPv6 destination to cloud metadata, localhost, or another internal IPv4 host. The notifier test path returns delivery result information, and Shoutrrr propagates the response, providing feedback that can disclose retrieved metadata such as temporary credentials. Without NAT64 egress, the crafted IPv6 destination is not routable, but the guard still incorrectly classifies it as safe. This issue is fixed in version 0.26.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
sysadminsmedia homebox < 0.26.0 -

二、漏洞 CVE-2026-55473 的公开POC

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三、漏洞 CVE-2026-55473 的情报信息

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CVE-2026-55473 补丁与修复 (1)

CVE-2026-55473 其他参考 (2)

同批安全公告 · sysadminsmedia · 2026-09-21 · 共 5 条

CVE-2026-48976 8.1 HIGH HomeBox: Cross-Tenant IDOR in Notifier Update Leaks Shoutrrr Credentials and Allows Webhoo
CVE-2026-48826 8.1 HIGH HomeBox: Cross-Group Inventory Wipe in Homebox via Global Owner Role and X-Tenant Header S
CVE-2026-48975 8.1 HIGH HomeBox: Cross-Tenant IDOR in MaintenanceEntry Update and Delete Allows Tampering and Dest
CVE-2026-48974 5.4 MEDIUM HomeBox: Forced Group Membership Without Consent in Homebox AddMember Handler

IV. Related Vulnerabilities

Same product: homebox
Same vendor: sysadminsmedia
Same weakness: CWE-918

V. Comments for CVE-2026-55473

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