Technology · Mozilla
Mozilla Thunderbird vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 267 vulnerabilities in Mozilla Thunderbird: 0 in the last 7 days and 161 in the last 90 days, 105 of them critical and 13 exploited in the wild. The most recent, CVE-2026-92240, was published on 15 September 2026.
- Last 7 days
- 0
- Last 90 days
- 161
- Critical, all time
- 105
- Exploited in the wild
- 13
About Mozilla Thunderbird
Thunderbird is a free and open-source cross-platform email client, personal information manager, news client, RSS and chat client developed by the Mozilla Foundation.
Latest Mozilla Thunderbird vulnerabilities
- CVE-2026-92240: Mozilla Thunderbird out-of-bounds read in IMAP response parsercriticalCVSS 9.1EPSS 0.6%
- CVE-2026-92239: Mozilla Thunderbird buffer overrun in IMAP response parsinghighCVSS 8.1EPSS 0.4%
- CVE-2026-92238: Mozilla Thunderbird mail header parsing ambiguitycriticalCVSS 9.8EPSS 0.5%
- CVE-2026-92079: Mozilla Firefox mitigation bypass in Widget: Win32criticalCVSS 9.1EPSS 0.5%
- CVE-2026-92078: Mozilla Firefox denial-of-service in Security componentmediumCVSS 6.5EPSS 0.4%
- CVE-2026-92077: Mozilla Firefox denial-of-service in SVG componentmediumCVSS 6.5EPSS 0.4%
- CVE-2026-92076: Mozilla Firefox incorrect boundary conditions in NetworkinghighCVSS 8.8EPSS 0.2%
- CVE-2026-92075: Mozilla Firefox mitigation bypass in Networking componentcriticalCVSS 9.1EPSS 0.5%
- CVE-2026-92074: Mozilla Firefox and Thunderbird Popup Blocker mitigation bypasshighCVSS 8.8EPSS 0.2%
- CVE-2026-92073: Mozilla Firefox privilege escalation in Enterprise PolicieshighCVSS 8.8EPSS 0.4%
- CVE-2026-92072: Mozilla Firefox incorrect boundary conditions in Safe Browsing componenthighCVSS 8EPSS 0.4%
- CVE-2026-92071: Mozilla Firefox sandbox escape in Widget: Win32 componentcriticalCVSS 9.6EPSS 0.5%
- CVE-2026-92070: Mozilla Firefox information disclosure in Networking componentmediumCVSS 4.3EPSS 0.3%
- CVE-2026-92069: Mozilla Firefox spoofing issue in DOM Navigation componentmediumCVSS 5.4EPSS 0.3%
- CVE-2026-92068: Mozilla Firefox site isolation issue in Reader ModemediumCVSS 5.4EPSS 0.2%
- CVE-2026-92067: Mozilla Firefox use-after-free in Widget: Gtk componenthighCVSS 8.8EPSS 0.5%
- CVE-2026-92066: Mozilla Firefox sandbox escape in Profile BackupcriticalCVSS 9.8EPSS 0.6%
- CVE-2026-92065: Mozilla Firefox sandbox escape in Widget: Win32highCVSS 8.8EPSS 0.2%
- CVE-2026-92064: Mozilla Firefox sandbox escape in Widget: Win32 componenthighCVSS 8.8EPSS 0.2%
- CVE-2026-92063: Mozilla Firefox denial-of-service in Audio/Video componentmediumCVSS 6.5EPSS 0.4%
- CVE-2026-92062: Mozilla Firefox privilege escalation in Session Restore componenthighCVSS 8.8EPSS 0.4%
- CVE-2026-92061: Mozilla Firefox incorrect boundary conditions in process sandboxingcriticalCVSS 9.8EPSS 0.6%
- CVE-2026-92060: Mozilla Firefox use-after-free in Internationalization componenthighCVSS 8.8EPSS 0.5%
- CVE-2026-92059: Mozilla Firefox incorrect boundary conditions in DOM Editor componentcriticalCVSS 9.3EPSS 0.2%
- CVE-2026-92058: Mozilla Firefox use-after-free in Graphics componenthighCVSS 8.8EPSS 0.5%
Most severe Mozilla Thunderbird vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2019-11708: Mozilla Firefox and Thunderbird Sandbox Escape Vulnerabilitycriticalexploited in the wildCVSS 10
- CVE-2010-3765: Mozilla Multiple Products memory corruption in nsCSSFrameConstructorcriticalexploited in the wildCVSS 9.8EPSS 86.6%
- CVE-2024-9680: Mozilla Firefox Use-After-Free Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2022-26486: Mozilla Firefox Use-After-Free Vulnerabilitycriticalexploited in the wildCVSS 9.6
- CVE-2015-4495: Mozilla Firefox Security Feature Bypass Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2019-11707: Mozilla Firefox and Thunderbird Type Confusion Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2013-1690: Mozilla Firefox and Thunderbird Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2022-26485: Mozilla Firefox Use-After-Free Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2019-17026: Mozilla Firefox And Thunderbird Type Confusion Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2020-6819: Mozilla Firefox And Thunderbird Use-After-Free Vulnerabilitycriticalexploited in the wildCVSS 8.1
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 2 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 1 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 52 | 15 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 30 | 10 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 76 | 21 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/thunderbird.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Mozilla Thunderbird vulnerabilities", https://junglewise.ai/threats/technologies/thunderbird, 26 September 2026.