Known Vulnerabilities for Thunderbird by Mozilla

Listed below are 10 of the newest known vulnerabilities associated with "Thunderbird" by "Mozilla".

These CVEs are retrieved based on exact matches on listed software, hardware, and vendor information (CPE data) as well as a keyword search to ensure the newest vulnerabilities with no officially listed software information are still displayed.

Data on known vulnerable versions is also displayed based on information from known CPEs

Known Vulnerabilities

CVE Shortened Description Severity Publish Date Last Modified
CVE-2026-84642 json The values of the mail.allowed_attachment_hostnames advanced config setting were used in a regular expression without escapin... Not Provided 2026-09-01 2026-09-02
CVE-2026-84641 json A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response. Heap contents... Not Provided 2026-09-01 2026-09-02
CVE-2026-84640 json A maliciously constructed mail header could lead to a one byte read past the end of a buffer. This vulnerability was fixed in... Not Provided 2026-09-01 2026-09-02
CVE-2026-84639 json Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. This vulnerability was fixe... Not Provided 2026-09-01 2026-09-02
CVE-2026-84637 json Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on Windows, bypas... Not Provided 2026-09-01 2026-09-02
CVE-2026-84145 json Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed... Not Provided 2026-09-01 2026-09-02
CVE-2026-84144 json Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence of memory corr... Not Provided 2026-09-01 2026-09-03
CVE-2026-84143 json Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed... Not Provided 2026-09-01 2026-09-03
CVE-2026-84142 json Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or another security... Not Provided 2026-09-01 2026-09-03
CVE-2026-84141 json Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunder... Not Provided 2026-09-01 2026-09-03
Results limited to 10 most recent vulnerabilities

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationMozillaThunderbird9.0.1
ApplicationMozillaThunderbird9.0
ApplicationMozillaThunderbird9.0
ApplicationMozillaThunderbird9.0
ApplicationMozillaThunderbird9.0
ApplicationMozillaThunderbird9.0
ApplicationMozillaThunderbird9.0
ApplicationMozillaThunderbird8.0
ApplicationMozillaThunderbird8.0
ApplicationMozillaThunderbird8.0
ApplicationMozillaThunderbird8.0
ApplicationMozillaThunderbird8.0
ApplicationMozillaThunderbird8.0
ApplicationMozillaThunderbird78.6.0
ApplicationMozillaThunderbird78.5.1
ApplicationMozillaThunderbird78.4.0
ApplicationMozillaThunderbird78.3
ApplicationMozillaThunderbird78.2
ApplicationMozillaThunderbird78.1.1
ApplicationMozillaThunderbird78.1.0
Results limited to 20 most recent known configurations

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report