Astra Linux – Vulnerability in dovecot

The attacker can upload a malicious Sieve script through the ManageSieve service or locally to bypass the configured CPU time limits for Sieve up to 130 times the configured limit. This allows the attacker to degrade server performance and bypass the configured CPU time limits for Sieve scripts. ...

CVE-2026-61911

A flaw was found in cyrus-imapd. An authenticated user could install a Sieve script to determine if another user's private mailbox exists. This is achieved by observing the behavior of the fileinto branch during Local Mail Transfer Protocol LMTP delivery. Additionally, this method could allow the...

CVE-2026-61911

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired...

CVE-2026-61911

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired...

UBUNTU-CVE-2026-61911

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired...

EUVD-2026-75129

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired...

CVE-2026-61911

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired...

CVE-2026-61911

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired...

SUSE CVE-2026-40013

An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes an out-of-bounds write when the ManageSieve service compiles the script. This causes memory corruption and an observed crash of the ManageSieve process, resulting in denial of...

CVE-2026-40013

A flaw was found in Dovecot. An authenticated attacker can submit a specially crafted Sieve script containing an extreme numeric literal to the ManageSieve service. This action triggers an out-of-bounds write during script compilation, leading to memory corruption and a crash of the ManageSieve...

SUSE CVE-2026-33605

An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authenticating. If running in high-security mode default for community releases, only the attacker's own connection is terminated. If running in high-performance mode default for Pro...

Linux Distros Unpatched Vulnerability : CVE-2026-33605

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An unauthenticated attacker can crash the ManageSieve login process by sending a small malformed command before authenticating. If running in high-security mode...

Linux Distros Unpatched Vulnerability : CVE-2026-40013

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes an out-of-bounds write when the ManageSieve...

CVE-2026-40013

An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes an out-of-bounds write when the ManageSieve service compiles the script. This causes memory corruption and an observed crash of the ManageSieve process, resulting in denial of...

AZL-98268 CVE-2026-40013 affecting package dovecot 2.3.20-1

An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes an out-of-bounds write when the ManageSieve service compiles the script. This causes memory corruption and an observed crash of the ManageSieve process, resulting in denial of...

EUVD-2026-67672

An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write memory contents beyond the intended buffer into the delivered mail. This causes memory leak and opportunity to do memory corruption during...

CVE-2026-42007

An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write memory contents beyond the intended buffer into the delivered mail. This causes memory leak and opportunity to do memory corruption during...

CVE-2026-40013

CVE-2026-40013 affects the ManageSieve service in Open-Xchange Dovecot. An attacker with valid credentials can submit a Sieve script containing an extreme numeric literal , triggering an out-of-bounds write during script compilation. This leads to memory corruption and a crash of the ManageSieve ...

CVE-2026-40013

An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes an out-of-bounds write when the ManageSieve service compiles the script. This causes memory corruption and an observed crash of the ManageSieve process, resulting in denial of...

EUVD-2026-67663

An attacker that has valid credentials can submit a Sieve script containing an extreme numeric literal, which causes an out-of-bounds write when the ManageSieve service compiles the script. This causes memory corruption and an observed crash of the ManageSieve process, resulting in denial of...