What is CVE-2026-61908?

CVE-2026-61908 is a low-severity vulnerability in Cyrusimap Cyrus Imap, classified under Out-of-bounds Read. CVSS score: 3.1/10. Published 2026-09-09.

How severe is CVE-2026-61908?

Low severity. CVSS v3 base score is 3.1 out of 10.

Out-of-bounds Read in Cyrusimap Cyrus Imap

CVE-2026-61908

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.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Cyrusimap Cyrus Imap

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-61908?: CVE-2026-61908 is a low-severity vulnerability in Cyrusimap Cyrus Imap, classified under Out-of-bounds Read. CVSS score: 3.1/10. Published 2026-09-09.
How severe is CVE-2026-61908?: Low severity. CVSS v3 base score is 3.1 out of 10.