CVE-2026-84641: Use After Free

A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response. Heap contents can ultimately be persisted to prefs.js. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2...

AlmaLinux 9 : ruby:3.3 (ALSA-2026:50828)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:50828 advisory. zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader CVE-2026-27820 net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF...

PT-2026-89829

Add basic validation for content proxied by the css proxy Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets, reported by Dmytro Ivanenko Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is local url check, reported by Milan Hoppe F...

Mozilla Thunderbird < 153.2

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 153.2. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-88 advisory. - Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in...

PT-2026-84527

Name of the Vulnerable Software and Affected Versions Thunderbird versions prior to 140.15 Thunderbird versions prior to 153.2 Thunderbird versions prior to 155 Description A malicious IMAP server can trigger a use-after-free a situation where a program continues to use a pointer after it has bee...

Security Vulnerabilities fixed in Thunderbird 153.2 — Mozilla

Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. A maliciously constructed mail header could lead to a one byte read past the end of a buffer. A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID...

Security Vulnerabilities fixed in Thunderbird 140.15 — Mozilla

Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. A maliciously constructed mail header could lead to a one byte read past the end of a buffer. A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID...

Security Vulnerabilities fixed in Thunderbird 155 — Mozilla

Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. A maliciously constructed mail header could lead to a one byte read past the end of a buffer. A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID...

TencentOS Server 3: ruby:3.3 (TSSA-2026:0933)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0933 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities...

Mozilla Thunderbird < 140.15

The version of Thunderbird installed on the remote Windows host is prior to 140.15. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-87 advisory. - Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 15...

Mozilla Thunderbird < 155.0

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 155.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-86 advisory. - Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in...

AlmaLinux 9 : ruby:4.0 (ALSA-2026:50827)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:50827 advisory. zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader CVE-2026-27820 net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF...

CVE-2026-27852

A flaw was found in dovecot. A remote attacker can craft a malicious email with an excessive number of email addresses or MIME parameters in its headers. When a user attempts to read this message over IMAP, the parsing process consumes an inordinate amount of memory, leading to the termination of...

OESA-2026-3537 ruby security update

Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks such as Perl. Security Fixes: The attack vector is a potential Denial of Service DoS. The vulnerability is caused by an...

OESA-2026-3536 ruby security update

Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks such as Perl. Security Fixes: The attack vector is a potential Denial of Service DoS. The vulnerability is caused by an...

OESA-2026-3533 ruby security update

Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks such as Perl. Security Fixes: The attack vector is a potential Denial of Service DoS. The vulnerability is caused by an...

[SECURITY] [DLA 4760-1] roundcube security update

Debian LTS Advisory DLA-4760-1 [email protected] https://www.debian.org/lts/security/ Guilhem Moulin August 29, 2026 https://wiki.debian.org/LTS Package : roundcube Version : 1.4.15+dfsg.1-1+deb11u11 1.6.5+dfsg-1+deb12u11 CVE ID : CVE-2026-74997 CVE-2026-74998 CVE-2026-74999...

SUSE CVE-2026-27852

An attacker that can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters, which causes excessive memory usage when the message is later parsed. The message is still delivered, but reading it over IMAP can exhaust the memory limit...

SUSE CVE-2026-33607

An attacker that has valid credentials can use IMAP LIST command to consume CPU. This can cause degradation or denial of service for IMAP. Monitor system for abnormal CPU usage and kill the offending process and lock account. Alternatively install fixed version. No publicly available exploits are...

SUSE CVE-2026-40014

An attacker that can send mail to a user can craft a message header that makes the IMAP THREAD command consume CPU disproportionate to the size of the message. When a mail client issues a THREAD command on the affected mailbox, this can cause degradation or denial of service for IMAP. Monitor...