CVE-2026-61908

Published: Sep 9, 2026Modified: Sep 16, 2026

6.5

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitability: 2.8 / Impact: 3.6

Source: NVD

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.

Affected (3)

Products: Cyrus: Imap

1 product

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Cyrus Imap	version < 3.8.8
Cyrus Imap	3.11.0 ≤ version < 3.12.4
Cyrus Imap	3.9.0 ≤ version < 3.10.4

Related CWEs

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

References (4)

https://cyrusimap.org

Source: cve@mitre.org

Product

https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html

Source: cve@mitre.org

Release Notes

https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html

Source: cve@mitre.org

Release Notes

https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html

Source: cve@mitre.org

Release Notes

Timeline

No history available yet.