CVE-2026-41259
8.2
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
Mastodon is a free, open-source social network server based on ActivityPub. Prior to v4.5.9, v4.4.16, and v4.3.22, Mastodon allows restricting new user sign-up based on e-mail domain names, and performs basic validation on e-mail addresses, but fails to restrict characters that are interpreted differently by some mailing servers. This vulnerability is fixed in v4.5.9, v4.4.16, and v4.3.22.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| mastodon | mastodon | < 4.3.22 | affected |
| mastodon | mastodon | >= 4.4.0-beta.1, < 4.4.16 | affected |
| mastodon | mastodon | >= 4.5.0-beta.1, < 4.5.9 | affected |
Weaknesses
- CWE-841: CWE-841: Improper Enforcement of Behavioral Workflow
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
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