CVE-2026-55473

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Source

https://cve.org/CVERecord?id=CVE-2026-55473

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55473.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-55473

Aliases

GHSA-r9pf-rg22-655m

Published

2026-09-21T17:44:41Z

Modified

2026-09-25T03:30:33Z

Severity

6.0 (Medium) CVSS_V4 - 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 CVSS Calculator

Summary

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

Details

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.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-918"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55473.json"
}

References

Affected packages

Git / github.com/sysadminsmedia/homebox

Affected ranges

Type

GIT

Repo

https://github.com/sysadminsmedia/homebox

Events

Introduced

Fixed

42c52f7f7566b7fbd8017352187af20f552a4471

Fixed

c0bcd3b4682fce0fb512cb191ea754d725e416ee

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "0.26.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*

v0.1.0

v0.11.0

v0.11.1

v0.12.0

v0.12.1

v0.13.0

v0.14.0

v0.14.1

v0.14.2

v0.15.0

v0.15.1

v0.15.2

v0.16.0

v0.17.0

v0.17.1

v0.17.2

v0.18.0

v0.19.0

v0.2.0

v0.20.1

v0.20.2

v0.21.0

v0.22.0-rc.1

v0.22.1

v0.22.2

v0.22.3

v0.23.0

v0.23.0-rc.1

v0.23.1

v0.24.0

v0.24.0-rc.1

v0.24.1

v0.24.2

v0.25.0

v0.25.0-rc.1

v0.26.0-rc.1

v0.3.0

v0.3.1

v0.4.0

v0.5.0

v0.5.1

v0.6.0

v0.7.0

v0.8.0

v0.8.1

v0.8.2

v0.9.0

v0.9.1

v0.9.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55473.json"