low3.1
CVE-2026-61908
An issue was discovered in Cyrus IMAP before 3.12.4.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cyrus | Imap | before 3.8.8 from 3.9.0 before 3.10.4 from 3.11.0 before 3.12.4 |