Nixpkgs security tracker

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Permalink CVE-2026-50128

5.3 MEDIUM

CVSS version (CVSS): 3.1
Attack Vector (AV): Network (N)
Attack Complexity (AC): Low (L)
Privileges Required (PR): None (N)
User Interaction (UI): None (N)
Scope (S): Unchanged (U)
Confidentiality (C): None (N)
Integrity (I): Low (L)
Availability (A): None (N)
Modified Attack Vector (MAV): Network (N)
Modified Attack Complexity (MAC): Low (L)
Modified Privileges Required (MPR): None (N)
Modified User Interaction (MUI): None (N)
Modified Confidentiality (MC): None (N)
Modified Scope (MS): Unchanged (U)
Modified Integrity (MI): Low (L)
Modified Availability (MA): None (N)

updated 3 weeks, 6 days ago by @erictapen Activity log

Created suggestion 1 month ago
@erictapen ignored
7 packages
- bitlbee-mastodon
- mastodon-archive
- python312Packages.mastodon-py
- python313Packages.mastodon-py
- python314Packages.mastodon-py
- home-assistant-component-tests.mastodon
- wordpressPackages.plugins.simple-mastodon-verification
3 weeks, 6 days ago
@erictapen dismissed 3 weeks, 6 days ago

Mastodon: Spoofing of attribution domains

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.