CVE-2026-110777
A flaw was found in evolution-data-server.
Published Oct 14, 2026 · updated Oct 14, 2026 · Red Hat Red Hat Enterprise Linux 10
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.
Timeline
Detection, updates, and resolution for this record.
Oct 14, 2026 · NIST NVD
Detected
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
Oct 14, 2026 · NIST NVD
Updated
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
Oct 14, 2026 · NIST NVD
Updated
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
Affected
- vendor Red Hat Red Hat Enterprise Linux 10version unspecified
- vendor Red Hat Red Hat Enterprise Linux 6version unspecified
- vendor Red Hat Red Hat Enterprise Linux 7version unspecified
- vendor Red Hat Red Hat Enterprise Linux 8version unspecified
- vendor Red Hat Red Hat Enterprise Linux 9version unspecified
Sources
- CVE.orgCVE-2026-110777
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 che
cve.org - NIST NVDCVE-2026-110777
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 che
nvd.nist.gov