Bug 2501455 (CVE-2026-47088) - CVE-2026-47088 cyrus-imapd: Cyrus IMAP: Information disclosure via heap exposure in MIME comment parsing
Summary: CVE-2026-47088 cyrus-imapd: Cyrus IMAP: Information disclosure via heap expos...
Keywords:
Status: NEW
Alias: CVE-2026-47088
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2501663
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-16 19:01 UTC by OSIDB Bzimport
Modified: 2026-07-17 03:44 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-07-16 19:01:52 UTC 
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.
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