BIT-mastodon-2026-23963

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Import Source
https://github.com/bitnami/vulndb/tree/main/data/mastodon/BIT-mastodon-2026-23963.json
JSON Data
https://api.osv.dev/v1/vulns/BIT-mastodon-2026-23963
Aliases
Published
2026-02-03T08:44:38.949Z
Modified
2026-02-03T09:25:55.663560Z
Summary
Mastodon missing length limits on list names, filter names, and filter keywords
Details

Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.5.5, 4.4.12, and 4.3.18, the server does not enforce a maximum length for the names of lists or filters, or for filter keywords, allowing any user to set an arbitrarily long string as the name or keyword. Any local user can abuse the list or filter fields to cause disproportionate storage and computing resource usage. They can additionally cause their own web interface to be unusable, although they must intentionally do this to themselves or unknowingly approve a malicious API client. Mastodon versions v4.5.5, v4.4.12, v4.3.18 are patched.

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

Affected packages

Bitnami / mastodon

Package

Name
mastodon
Purl
pkg:bitnami/mastodon

Severity

  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.18
Introduced
4.4.0
Fixed
4.4.12
Introduced
4.5.0
Fixed
4.5.5

Database specific

source
"https://github.com/bitnami/vulndb/tree/main/data/mastodon/BIT-mastodon-2026-23963.json"