CVE-2026-110777
A flaw was found in evolution-data-server
- Risk score
- 40/100
- CVSS
- 5.7 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 14 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 or…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 5.7 medium
References
Original 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.
Last activity 14 Oct 2026. Patch Forecast updates every hour.