CVE-2026-41259
- Source
- https://cve.org/CVERecord?id=CVE-2026-41259
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41259.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-41259
- Aliases
-
- BIT-mastodon-2026-41259
- GHSA-5r37-qpwq-2jhh
- Published
- 2026-04-23T18:55:20.854Z
- Modified
- 2026-07-08T08:26:07.897097117Z
- Severity
-
- 8.2 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- Mastodon: Insufficient verification of email addresses
- Details
-
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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41259.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-841" ] }- References
Affected packages
Git / github.com/mastodon/mastodon
Affected ranges
- Type
- GIT
- Repo
- https://github.com/mastodon/mastodon
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedFixedIntroducedFixed
- Database specific
{ "source": "CPE_RANGE", "cpe": "cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "4.3.22" }, { "introduced": "4.4.0" }, { "fixed": "4.4.16" }, { "introduced": "4.5.0" }, { "fixed": "4.5.9" } ] }
Affected versions
v0.*
v0.1.0
v0.1.1
v0.1.2
v0.6
v0.7
v0.8
v0.9
v0.9.9
v1.*
v1.0
v1.1
v1.1.1
v1.1.2
v1.2
v1.2.1
v1.2.2
v1.3
v1.3.1
v1.3.2
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.4rc1
v1.4rc2
v1.4rc3
v1.4rc4
v1.4rc5
v1.4rc6
v1.5.0
v1.5.0rc1
v1.5.0rc2
v1.5.0rc3
v1.5.1
v1.6.0
v1.6.0rc1
v1.6.0rc2
v1.6.0rc3
v1.6.0rc4
v1.6.0rc5
v1.6.1
v2.*
v2.0.0
v2.0.0rc1
v2.0.0rc2
v2.0.0rc3
v2.0.0rc4
v2.1.0
v2.1.0rc1
v2.1.0rc2
v2.1.0rc3
v2.1.0rc4
v2.1.0rc5
v2.1.0rc6
v2.1.1
v2.1.2
v2.1.3
v2.2.0
v2.2.0rc1
v2.2.0rc2
v2.3.0
v2.3.0rc1
v2.3.0rc2
v2.3.0rc3
v2.3.1
v2.3.1rc1
v2.3.1rc2
v2.3.1rc3
v2.3.2
v2.3.2rc1
v2.3.2rc2
v2.3.2rc3
v2.3.2rc4
v2.3.2rc5
v2.4.0
v2.4.0rc1
v2.4.0rc2
v2.4.0rc3
v2.4.0rc4
v2.4.0rc5
v2.4.1
v2.4.1rc1
v2.4.1rc2
v2.4.1rc3
v2.4.1rc4
v2.4.2
v2.4.2rc1
v2.4.2rc2
v2.4.2rc3
v2.4.3
v2.4.3rc1
v2.4.3rc2
v2.4.3rc3
v2.5.0
v2.5.0rc1
v2.5.0rc2
v2.6.0
v2.6.0rc1
v2.6.0rc2
v2.6.0rc3
v2.6.0rc4
v2.6.1
v2.7.0
v2.7.0rc1
v2.7.0rc2
v2.7.0rc3
v2.7.1
v2.8.0
v2.8.0rc1
v2.8.0rc2
v2.8.0rc3
v2.8.1
v2.8.2
v2.9.0
v2.9.0rc1
v2.9.0rc2
v2.9.1
v2.9.2
v3.*
v3.0.0
v3.0.0rc1
v3.0.0rc2
v3.0.0rc3
v3.0.1
v3.1.0
v3.1.0rc1
v3.1.0rc2
v3.1.1
v3.1.2
v3.1.3
v3.1.4
v3.2.0
v3.2.0rc1
v3.2.0rc2
v3.3.0
v3.3.0rc1
v3.3.0rc2
v3.3.0rc3
v3.4.0
v3.4.0rc1
v3.4.0rc2
v3.4.1
v3.5.0
v3.5.0rc1
v3.5.0rc2
v3.5.0rc3
v3.5.1
v3.5.2
v3.5.3
v4.*
v4.0.0
v4.0.0rc1
v4.0.0rc2
v4.0.0rc3
v4.0.0rc4
v4.0.1
v4.0.2
v4.1.0
v4.1.0rc1
v4.1.0rc2
v4.1.0rc3
v4.2.0
v4.2.0-beta1
v4.2.0-beta2
v4.2.0-beta3
v4.2.0-rc1
v4.2.0-rc2
v4.3.0
v4.3.0-beta.1
v4.3.0-beta.2
v4.3.0-rc.1
v4.3.1
v4.3.10
v4.3.11
v4.3.12
v4.3.13
v4.3.14
v4.3.15
v4.3.16
v4.3.17
v4.3.18
v4.3.19
v4.3.2
v4.3.20
v4.3.21
v4.3.3
v4.3.4
v4.3.5
v4.3.6
v4.3.7
v4.3.8
v4.3.9
v4.4.0
v4.4.1
v4.4.10
v4.4.11
v4.4.12
v4.4.13
v4.4.14
v4.4.15
v4.4.2
v4.4.3
v4.4.4
v4.4.5
v4.4.6
v4.4.7
v4.4.8
v4.4.9
v4.5.0
v4.5.1
v4.5.2
v4.5.3
v4.5.4
v4.5.5
v4.5.6
v4.5.7
v4.5.8