CVE-2026-104816
High
Description
Misskey is an open source, federated social media platform. From 12.0.0 until 2026.7.0, the RSS components display feed item links from configured feeds without verifying their URL schemes. Missing URL scheme verification allows an attacker who controls feed content to provide an unsafe-scheme link that causes script execution when a user clicks it in an RSS widget. This issue is fixed in version 2026.7.0.
SeverityHigh
CVSS8.5
Exploit probability—
Product
Misskey
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| misskey-dev misskey | >= 12.0.0, <= 13.14.2, >= 2023.9.0-beta.1, < 2026.7.0 | — |
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