CVE-2026-61908

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-61908
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-09 20:18:36 UTC
Updated2026-09-10 19:17:31 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 3.1 LOW from [email protected]

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

EPSS: 0.002050000 probability, percentile 0.106460000 (date 2026-09-12)

Problem Types: CWE-125 | CWE-125 CWE-125 Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.1LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNACVSS3.1LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cyrusimap Cyrus IMAP affected 3.8.8 semver Not specified
CNA Cyrusimap Cyrus IMAP affected 3.9.0 3.10.4 semver Not specified
CNA Cyrusimap Cyrus IMAP affected 3.11.0 3.12.4 semver Not specified

References

ReferenceSourceLinkTags
www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html [email protected] www.cyrusimap.org
cyrusimap.org [email protected] cyrusimap.org
www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html [email protected] www.cyrusimap.org
www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html [email protected] www.cyrusimap.org
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