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Hash: SHA512

Format: 1.8
Date: Wed, 16 Sep 2026 15:06:35 -0400
Source: dovecot
Architecture: source
Version: 1:2.4.1+dfsg1-6+deb13u7
Distribution: trixie-security
Urgency: medium
Maintainer: Dovecot Maintainers <[email protected]>
Changed-By: Noah Meyerhans <[email protected]>
Closes: 1144639 1146018
Changes:
 dovecot (1:2.4.1+dfsg1-6+deb13u7) trixie-security; urgency=medium
 .
   * Import upstream fixes for multiple security issues. (Closes: #1146018)
     - CVE-2026-27852: DoS by sending mail with bad header
     - CVE-2026-33263: submission-login: Panic when
       mail_max_userip_connections is reached: Panic: epoll_ctl(del, 8)
       failed: Bad file descriptor
     - CVE-2026-33604: SMTP Smuggling via Missing Dot-Stuffing After Bare
       Carriage Return
     - CVE-2026-33605: managesieve-login: Pre-auth crash
     - CVE-2026-33607: Dovecot IMAP LIST match_sub() Exponential
       Backtracking — CPU Denial of Service
     - CVE-2026-40013: pigeonhole: Stack Buffer Underflow in Pigeonhole
       ManageSieve CHECKSCRIPT/PUTSCRIPT
     - CVE-2026-40014: IMAP THREAD REFERENCES O(N²) CPU DoS via Crafted
       References Header (index-thread-links.c)
     - CVE-2026-40015: imap-hibernate can be crashed
     - CVE-2026-40017: IMAP THREAD O(M³) CPU DoS via CRC32 Hash Collision
       in strmap (mail-index-strmap.c / hash2.c)
     - CVE-2026-40018: MySQL multi-byte escaping wrong
     - CVE-2026-40204: acl: lda_mailbox_autocreate can bypass acl
       restrictions
     - CVE-2026-42007: Sieve editheader RCE
     - CVE-2026-42391: imap: Pre-login memory/CPU growth with ID command
     - CVE-2026-42394: sieve: symlink traversal flaw could result in
       arbitrary file disclosure
     - CVE-2026-52681: Sieve resource usage tracking lost when active
       script changes
     - CVE-2026-52687: IMAP: COMPRESS ZSTD can cause excessive memory usage
     - CVE-2026-73209: imap-login crash: Self-recursion on zero-output
       decompress chunks
     - CVE-2026-33606: dsync: Mail content can cause dsync protocol
       injection
     - CVE-2026-40203: IMAP Compression Can Reveal Whether a Small Synced
       Email Body Matches Sender-Chosen Text
     - CVE-2026-42008: XCLIENT FORWARD= bare token not namespaced, allows
       nopassword injection via trusted proxy
     - CVE-2026-42392: imap-urlauth leaks memory into user-visible error
       messages
     - CVE-2026-42393: doveadm_password or api key length can still be
       leaked with timing comparisons
     - CVE-2026-42395: Single NUL-Byte XCLIENT FORWARD Payload Crashes
     - CVE-2026-40205: OAuth2 passdb scope enforcement bypass via OR
       semantics in remote validation path
     - CVE-2026-73208: auth: db-oauth2: aud claim used as fallback for
       missing scope claim
   * lib-mail: istream-header-filter - Fix potential assert-crash
     (Closes: #1144639)
   * CI: Disable test-build-twice job, which is known to fail on trixie
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