CVE-2026-47088

NameCVE-2026-47088
DescriptionAn 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-4766-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
cyrus-imapd (PTS)bookworm3.6.1-4+deb12u4vulnerable
bookworm (security)3.6.1-4+deb12u5fixed
trixie3.10.2-1+deb13u2fixed
forky, sid3.12.4-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
cyrus-imapdsourcebookworm3.6.1-4+deb12u5DLA-4766-1
cyrus-imapdsourcetrixie3.10.2-1+deb13u2
cyrus-imapdsource(unstable)3.12.3-1

Notes

https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html

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