CVE-2026-41259

N/A

Description

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.

CVE Details

CVSS v3.1 ScoreN/A

Published4/23/2026

Last Modified4/24/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-841

References

https://github.com/mastodon/mastodon/security/advisories/GHSA-5r37-qpwq-2jhh(security-advisories@github.com)

IOC Correlations

No correlations recorded

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