BIT-mastodon-2026-46348

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Import Source
https://github.com/bitnami/vulndb/tree/main/data/mastodon/BIT-mastodon-2026-46348.json
JSON Data
https://api.osv.dev/v1/vulns/BIT-mastodon-2026-46348
Aliases
Published
2026-07-06T05:55:14.471Z
Modified
2026-07-08T08:11:21.018948163Z
Summary
Mastodon: SSRF Bypass via IPv6 Unspecified Address (::)
Details

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, the list of disallowed IP address ranges was lacking an IP address range that can be used to reach local IP addresses. An attacker can use an IP address in the affected range to make Mastodon perform HTTP requests against loopback interfaces, potentially allowing access to otherwise private resources and services. This vulnerability is fixed in 4.5.10, 4.4.17, and 4.3.23.

Database specific
{
    "severity": "High",
    "cpes": [
        "cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*"
    ]
}
References

Affected packages

Bitnami / mastodon

Package

Name
mastodon
Purl
pkg:bitnami/mastodon

Severity

  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator

Affected ranges

Type
SEMVER
Events
Introduced
4.5.0
Fixed
4.5.10

Database specific

source
"https://github.com/bitnami/vulndb/tree/main/data/mastodon/BIT-mastodon-2026-46348.json"