UBUNTU-CVE-2026-61908
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-61908
Summary:
Details: JMAP email-header blob ID out-of-bounds index: An authenticated user could attempt to download a specially 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.
References: https://ubuntu.com/security/CVE-2026-61908, https://www.cve.org/CVERecord?id=CVE-2026-61908
Affected packages
Package
Name: cyrus-imapd
Purl: pkg:deb/ubuntu/cyrus-imapd?arch=source&distro=esm-apps%2Fbionic
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -None
Affected versions
2.5.10-3build1
2.5.10-3build2
2.5.10-3ubuntu1
2.5.10-3ubuntu1.1
2.5.10-3ubuntu1.1+esm1
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
