CVE-2026-55473

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/sysadminsmedia/homebox/commit/42c52f7f7566b7fbd8017352187af20f552a4471
https://github.com/sysadminsmedia/homebox/releases/tag/v0.26.0
https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-r9pf-rg22-655m

Configurations

No configuration.

History

21 Sep 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-21 18:17

Updated : 2026-09-29 15:17

NVD link : CVE-2026-55473

Mitre link : CVE-2026-55473

CVE.ORG link : CVE-2026-55473

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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