Vulnerability in Misskey Open Source Social Media Platform
CVE-2026-104816

8.5HIGH

Key Information:

Vendor

Misskey-dev

Status
Misskey
Vendor
CVE Published:
13 October 2026

What is CVE-2026-104816?

The Misskey social media platform has a security issue in its RSS components where it fails to validate URL schemes for feed item links. This oversight permits an attacker with control over the feed content to insert unsafe-scheme links. If users interact with these links through the RSS widget, it might lead to unintended script execution, potentially compromising user security. This vulnerability affects versions up to 2026.6.0 and was resolved in version 2026.7.0.

Affected Version(s)

misskey >= 12.0.0, <= 13.14.2 <= 12.0.0, 13.14.2

misskey >= 2023.9.0-beta.1, < 2026.7.0 < 2023.9.0-beta.1, 2026.7.0

References

https://github.com/misskey-dev/misskey/security/advisorie...
x_refsource_CONFIRM
https://github.com/misskey-dev/misskey/pull/17831
x_refsource_MISC
https://github.com/misskey-dev/misskey/commit/8dd59a8c06d...
x_refsource_MISC

CVSS V4

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.