BIT-mastodon-2026-50128
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/mastodon/BIT-mastodon-2026-50128.json
- JSON Data
- https://api.osv.dev/v1/vulns/BIT-mastodon-2026-50128
- Aliases
- Published
- 2026-07-06T05:55:21Z
- Modified
- 2026-07-06T08:00:28Z
- Summary
- Mastodon: Spoofing of attribution domains
- Details
-
Mastodon is a free, open-source social network server based on ActivityPub. From 4.3.0 until 4.5.11 and 4.4.18, Mastodon has a feature to let websites credit authors of their articles. To prevent false attribution claims, Mastodon uses the attributionDomains JSON-LD term, however, an error in how it is defined makes Linked Data Signatures on the toot:attributionDomains property ineffective. An attacker can arbitrarily modify the attributionDomains value of a legitimately signed Update activity and bypass Mastodon’s signature verification. This vulnerability is fixed in 4.5.11 and 4.4.18.
- Database specific
{ "cpes": [ "cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*" ], "severity": "Medium" }- References
Affected packages
Bitnami / mastodon
Package
- Name
- mastodon
- Purl
- pkg:bitnami/mastodon
Severity
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator