Vulnerability Description
Misskey is an open source, federated social media platform. Prior to 2026.6.0, Misskey contains a Server-Side Request Forgery (SSRF) vulnerability in URL preview functionality in UrlPreviewService. Due to missing network restrictions before establishing outbound connections, a remote attacker can cause the Misskey server to initiate HTTP requests to loopback, private, or link-local services. Because IP address validation takes place after the request has been sent and the process is subsequently rejected, no sensitive internal data is believed to be transmitted back or exposed to the attacker. This issue is fixed in version 2026.6.0.
Related Weaknesses (CWE)
References
- https://github.com/misskey-dev/misskey/commit/1eac4ccf513a067b9f7b7d123057c09a38
- https://github.com/misskey-dev/misskey/releases/tag/2026.6.0
- https://github.com/misskey-dev/misskey/security/advisories/GHSA-jvcx-f39m-5xrj
FAQ
What is CVE-2026-57575?
CVE-2026-57575 is a documented vulnerability. Misskey is an open source, federated social media platform. Prior to 2026.6.0, Misskey contains a Server-Side Request Forgery (SSRF) vulnerability in URL preview functionality in UrlPreviewService. Du...
How severe is CVE-2026-57575?
CVSS scoring is not yet available for CVE-2026-57575. Check NVD for updates.
Is there a patch for CVE-2026-57575?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.