CVE-2026-104816 Misskey - Stored XSS

Misskey 12.0.0 < 2026.7.0 contains a stored XSS caused by missing URL scheme verification in RSS feed item links, letting attackers controlling feed content execute scripts when users click links in RSS widgets, exploit requires attacker to control feed content.

CVSS base score 8.5 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.63% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 2026.7.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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