CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service or locally to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed...

UBUNTU-CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service or locally to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed...

CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service or locally to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed...

CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service or locally to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed...

CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service or locally to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed...

CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service or locally to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed...

CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service or locally to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed...

CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service or locally to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed...

CVE-2026-40016

CVE-2026-40016: An attacker can upload a malicious Sieve script via ManageSieve (or local access) to bypass CPU time limits, potentially increasing allowed run time up to 130× the configured limit and degrading server performance. Affected component is the Sieve execution/ManageSieve handling; ro...

PT-2026-40027

Name of the Vulnerable Software and Affected Versions dovecot versions prior to 2.4.4-1.1 Description An attacker can upload a malicious Sieve script via the 'ManageSieve' service or local access to bypass configured CPU time limits for Sieve by up to 130 times the limit. This can lead to degrade...

EUVD-2009-2626

Malware in sbrugna...

EUVD-2019-9382

Malware in sbrugna...

Linux Distros Unpatched Vulnerability : CVE-2019-19783

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in Cyrus IMAP before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8. If sieve script uploading is allowed 3.x or certain non-defau...

SUSE CVE-2009-2632

Buffer overflow in the SIEVE script component sieve/script.c, as used in cyrus-imapd in Cyrus IMAP Server 2.2.13 and 2.3.14, and Dovecot 1.0 before 1.0.4 and 1.1 before 1.1.7, allows local users to execute arbitrary code and read or modify arbitrary messages via a crafted SIEVE script, related to...

SUSE CVE-2009-3235

Multiple stack-based buffer overflows in the Sieve plugin in Dovecot 1.0 before 1.0.4 and 1.1 before 1.1.7, as derived from Cyrus libsieve, allow context-dependent attackers to cause a denial of service crash and possibly execute arbitrary code via a crafted SIEVE script, as demonstrated by...

SUSE CVE-2019-19783

An issue was discovered in Cyrus IMAP before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8. If sieve script uploading is allowed 3.x or certain non-default sieve options are enabled 2.x, a user with a mail account on the service can use a sieve script containing a fileinto directive to...

NewStart CGSL MAIN 6.02 : cyrus-imapd Multiple Vulnerabilities (NS-SA-2021-0086)

The remote NewStart CGSL host, running version MAIN 6.02, has cyrus-imapd packages installed that are affected by multiple vulnerabilities: - Cyrus IMAP 2.5.x before 2.5.14 and 3.x before 3.0.12 allows privilege escalation because an HTTP request may be interpreted in the authentication context o...

Oracle Linux 8 : cyrus-imapd (ELSA-2020-4655)

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-4655 advisory. - Add fix for CVE-2019-19783 Tenable has extracted the preceding description block directly from the Oracle Linux security advisory. Note that Nessus h...

cyrus-imapd: lmtpd component created mailboxes with administrator privileges if the "fileinto" was used, bypassing ACL checks

An issue was discovered in Cyrus IMAP before 2.5.15, 3.0.x before 3.0.13, and 3.1.x through 3.1.8. If sieve script uploading is allowed 3.x or certain non-default sieve options are enabled 2.x, a user with a mail account on the service can use a sieve script containing a fileinto directive to...

Open-Xchange: A malicious user can upload a malicious script through managesieve and trigger its execution in order to consume almost 100% of CPU (LMTP).

Summary A malicious user can create a malicious sieve script attached as "test.sieve", upload it to the server through managesieve and set as active. Then the user can send several specially crafted messages to himself to trigger long script execution. The attacker has to send one message per...