CVE-2026-61908
LOW
NVD
CVSS Score
3.1
Severity
LOW
Published
Sep 09, 2026
Vendor
unknown
Description
An issue was discovered in Cyrus IMAP before 3.12.4. A JMAP email-header blob ID can reference an out-of-bounds index. An authenticated user could attempt to download a crafted JMAP blob ID of the form H<emailid>-<index>, which could read past the end of the internal blob_headers array during download, exposing adjacent heap memory.