BIT-mastodon-2026-47389
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/mastodon/BIT-mastodon-2026-47389.json
- JSON Data
- https://api.osv.dev/v1/vulns/BIT-mastodon-2026-47389
- Aliases
-
- CVE-2026-47389
- GHSA-xx55-4rrg-8xg6
- Published
- 2026-07-06T05:55:17Z
- Modified
- 2026-07-08T08:26:11Z
- Summary
- Mastodon: SSRF protection bypass on older Ruby versions
- Details
-
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.10, 4.4.17, and 4.3.23, when using Ruby versions older than 3.4, PrivateAddressCheck.private_address? returns false for IPv4-mapped IPv6 addresses (::ffff:a.b.c.d) corresponding to some private IPv4 addresses, depending on Ruby version, this can include loopback, RFC1918 private networks, and link-local space. An attacker who controls DNS for any domain can publish an AAAA record with such a mapped address; any outbound HTTP fetch Mastodon performs against that hostname then opens a real TCP connection to the underlying IPv4 address, including 127.0.0.1 and cloud-metadata endpoints such as 169.254.169.254. This vulnerability is fixed in 4.5.10, 4.4.17, and 4.3.23.
- Database specific
{ "cpes": [ "cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*" ], "severity": "High" }- References
Affected packages
Bitnami / mastodon
Package
- Name
- mastodon
- Purl
- pkg:bitnami/mastodon
Severity
- 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N CVSS Calculator