CVE-2026-105862 Payload - Stored XSS

Payload before 3.90.0 and canary versions before 4.0.0-canary.34 contain a stored XSS caused by insufficient sanitization of downloadable SVG uploads in collections, letting attackers execute JavaScript when users open the SVG, exploit requires user to download and open the SVG.

CVSS base score 8.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.25% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Client Script Exec
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Published
6 October 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to versions 3.90.0 or 4.0.0-canary.34 or later.

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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