Bug 2526304 (CVE-2026-61908) - CVE-2026-61908 cyrus-imapd: cyrus-imapd: JMAP email-header blob ID out-of-bounds index
Summary: CVE-2026-61908 cyrus-imapd: cyrus-imapd: JMAP email-header blob ID out-of-bou...
Keywords:
Status: NEW
Alias: CVE-2026-61908
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2531315
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-31 14:13 UTC by OSIDB Bzimport
Modified: 2026-09-10 08:36 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-08-31 14:13:40 UTC 
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.
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