AlmaLinux 9.2 [TuxCare] Security Update: thunderbird Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1779579653)

The AlmaLinux 9.2 host has a package installed that is affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1779579653 advisory. - It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an incorre...

Astra Linux – Vulnerability in Thunderbird

Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments that can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine the file size, and navigates to the attachment when the user clicks on it. Since the URL is not...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: thunderbird (UTSA-2026-101336)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-101336 advisory. Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesse...

TencentOS Server 3: thunderbird (TSSA-2025:0445)

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-2025:0445 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities...

thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking

The Mozilla Foundation's Security Advisory describes the following issue: It is possible to craft an email that shows a tracking link as an attachment. If the user attempts to open the attachment, Thunderbird automatically accesses the link. The configuration to block remote content does not...

thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link

The Mozilla Foundation's Security Advisory describes the following issue: Thunderbird's handling of the X-Mozilla-External-Attachment-URL header can be exploited to execute JavaScript in the file:/// context. By crafting a nested email attachment message/rfc822 and setting its content type to...

thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link

The Mozilla Foundation's Security Advisory describes the following issue: Thunderbird's handling of the X-Mozilla-External-Attachment-URL header can be exploited to execute JavaScript in the file:/// context. By crafting a nested email attachment message/rfc822 and setting its content type to...

thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking

The Mozilla Foundation's Security Advisory describes the following issue: It is possible to craft an email that shows a tracking link as an attachment. If the user attempts to open the attachment, Thunderbird automatically accesses the link. The configuration to block remote content does not...

thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking

The Mozilla Foundation's Security Advisory describes the following issue: It is possible to craft an email that shows a tracking link as an attachment. If the user attempts to open the attachment, Thunderbird automatically accesses the link. The configuration to block remote content does not...

thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link

The Mozilla Foundation's Security Advisory describes the following issue: Thunderbird's handling of the X-Mozilla-External-Attachment-URL header can be exploited to execute JavaScript in the file:/// context. By crafting a nested email attachment message/rfc822 and setting its content type to...

thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking

The Mozilla Foundation's Security Advisory describes the following issue: It is possible to craft an email that shows a tracking link as an attachment. If the user attempts to open the attachment, Thunderbird automatically accesses the link. The configuration to block remote content does not...

thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link

The Mozilla Foundation's Security Advisory describes the following issue: Thunderbird's handling of the X-Mozilla-External-Attachment-URL header can be exploited to execute JavaScript in the file:/// context. By crafting a nested email attachment message/rfc822 and setting its content type to...

thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking

The Mozilla Foundation's Security Advisory describes the following issue: It is possible to craft an email that shows a tracking link as an attachment. If the user attempts to open the attachment, Thunderbird automatically accesses the link. The configuration to block remote content does not...

Important: thunderbird

Issue Overview: Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an invalid value "Spoofed Name ", Thunderbird treats [email protected] as the actual address. This...

Important: thunderbird

Issue Overview: Through a series of popup and window.print calls, an attacker can cause a window to go fullscreen without the user seeing the notification prompt, resulting in potential user confusion or spoofing attacks. This vulnerability affects Firefox ESR 102.5, Thunderbird 102.5, and Firefo...

thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking

The Mozilla Foundation's Security Advisory describes the following issue: It is possible to craft an email that shows a tracking link as an attachment. If the user attempts to open the attachment, Thunderbird automatically accesses the link. The configuration to block remote content does not...

thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link

The Mozilla Foundation's Security Advisory describes the following issue: Thunderbird's handling of the X-Mozilla-External-Attachment-URL header can be exploited to execute JavaScript in the file:/// context. By crafting a nested email attachment message/rfc822 and setting its content type to...

thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking

The Mozilla Foundation's Security Advisory describes the following issue: It is possible to craft an email that shows a tracking link as an attachment. If the user attempts to open the attachment, Thunderbird automatically accesses the link. The configuration to block remote content does not...

The vulnerability of the Thunderbird email client, related to bypassing authentication through spamming, allows a hacker to execute arbitrary code.

The vulnerability of the Thunderbird email client relates to bypassing authentication through spamming when processing the X-Mozilla-External-Attachment-URL header. Exploiting this vulnerability allows a remote attacker to execute arbitrary code...

Mozilla Thunderbird Cross-Site Scripting Vulnerability (CNVD-2025-18673)

Mozilla Thunderbird is the United States Mozilla Foundation's set of independent from the Mozilla Application Suite e-mail client software. The program supports IMAP, POP mail protocols and HTML mail format. A cross-site scripting vulnerability exists in Mozilla Thunderbird, which stems from...