CVE-2026-110777
MEDIUM
NVD
CVSS Score
5.7
Severity
MEDIUM
Published
Oct 14, 2026
Vendor
unknown
Description
A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.