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.
Metrics
Affected Vendors & Products
References
History
Wed, 09 Sep 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Out‑of‑Bounds Read via JMAP Blob ID in Cyrus IMAP |
Wed, 09 Sep 2026 20:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| First Time appeared |
Cyrusimap
Cyrusimap cyrus Imap |
|
| Weaknesses | CWE-125 | |
| CPEs | cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Cyrusimap
Cyrusimap cyrus Imap |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: mitre
Published: 2026-09-09T00:00:00.000Z
Updated: 2026-09-09T19:44:57.533Z
Reserved: 2026-07-13T00:00:00.000Z
Link: CVE-2026-61908
No data.
Status : Awaiting Analysis
Published: 2026-09-09T20:18:36.383
Modified: 2026-09-09T20:22:32.663
Link: CVE-2026-61908
No data.