CVE-2026-110777
A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted
CVSS
5.7
Medium
EPSS
0.4%
p32
KEV
—
Exploit Today
10
0-100
Published: Oct 14, 2026 · Last modified: Oct 15, 2026 · CWE-200
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.