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-2026-126136 json For Exchange accounts using EWS or Microsoft Graph with OAuth2 authentication, Thunderbird sent the OAuth2 access token to th... Not Provided 2026-11-10 2026-11-10
CVE-2026-126135 json If an attacker was able to perform a man-in-the-middle attack on an SMTP or POP3 server connection using STARTTLS, the attack... Not Provided 2026-11-10 2026-11-10
CVE-2026-126134 json Thunderbird allowed feed subscriptions to file: URLs that point to a network share. If a user was tricked into subscribing to... Not Provided 2026-11-10 2026-11-10
CVE-2026-126133 json When a CalDAV or ICS calendar was accessed through an HTTP proxy that requested authentication, Thunderbird could answer the ... Not Provided 2026-11-10 2026-11-10
CVE-2026-126132 json When a message was forwarded inline, edited as new, or had an attachment dragged into a compose window, a specially crafted l... Not Provided 2026-11-10 2026-11-10
CVE-2026-124951 json Privilege escalation in the Nimbus Desktop Client component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, ... Not Provided 2026-11-10 2026-11-10
CVE-2026-124950 json Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160 and Thund... Not Provided 2026-11-10 2026-11-10
CVE-2026-124949 json Other issue in the SVG component. This vulnerability was fixed in Firefox 160 and Thunderbird 160. Not Provided 2026-11-10 2026-11-10
CVE-2026-124948 json Incorrect boundary conditions, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 160, Firefox... Not Provided 2026-11-10 2026-11-10
CVE-2026-124947 json Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 160 and Thunderbird 160. Not Provided 2026-11-10 2026-11-10
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

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