Technology · Mozilla
Mozilla Thunderbird-Esr vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 86 vulnerabilities in Mozilla Thunderbird-Esr: 0 in the last 7 days and 57 in the last 90 days, 26 of them critical and 2 exploited in the wild. The most recent, CVE-2026-109781, was published on 13 October 2026. 20 vulnerabilities in the last four weeks, up 43% on the four before (14). 2 critical against 3.
- Last 7 days
- 0
- Last 90 days
- 57
- Critical, all time
- 26
- Exploited in the wild
- 2
About Mozilla Thunderbird-Esr
An Extended Support Release version of the open-source email client designed for organizations requiring long-term stability.
Latest Mozilla Thunderbird-Esr vulnerabilities
- CVE-2026-109781: Mozilla Firefox denial-of-service in Printing: OutputmediumCVSS 6.5EPSS 0.3%
- CVE-2026-109776: Mozilla Firefox race condition in XPCOM componentmediumCVSS 4.2EPSS 0.1%
- CVE-2026-109775: Mozilla Firefox denial-of-service in WebRTC componentmediumCVSS 6.5EPSS 0.3%
- CVE-2026-109767: Mozilla Firefox information disclosure in Networking componentmediumCVSS 4.3EPSS 0.2%
- CVE-2026-109766: Firefox mitigation bypass in Enterprise PoliciesinfoEPSS 0.2%
- CVE-2026-109764: Mozilla Firefox Enterprise Policies mitigation bypassinfoEPSS 0.2%
- CVE-2026-109763: Mozilla Firefox file handling mitigation bypassinfoEPSS 0.2%
- CVE-2026-109762: Mozilla Firefox incorrect boundary conditions in SVG componentinfoEPSS 0.2%
- CVE-2026-109752: Mozilla Firefox use-after-free in DOM: Workers componentmediumCVSS 5.4EPSS 0.2%
- CVE-2026-109740: Firefox sandbox escape in Widget Win32 due to incorrect boundary conditionsinfoEPSS 0.2%
- CVE-2026-109737: Firefox mitigation bypass in Enterprise PoliciesinfoEPSS 0.2%
- CVE-2026-109734: Firefox mitigation bypass in DOM Security componentinfoEPSS 0.2%
- CVE-2026-109731: Mozilla Firefox incorrect boundary conditions in Canvas2DinfoEPSS 0.2%
- CVE-2026-109724: Firefox use-after-free in DOM: Core & HTMLmediumCVSS 5.4EPSS 0.2%
- CVE-2026-109723: Mozilla Firefox integer overflow in Layout: Text and FontsmediumCVSS 5.4EPSS 0.2%
- CVE-2026-109721: Mozilla Firefox incorrect boundary conditions in JavaScript Engine JITinfoEPSS 0.3%
- CVE-2026-109713: Mozilla Firefox use-after-free in Crash ReportingmediumCVSS 5.4EPSS 0.2%
- CVE-2026-109711: Mozilla Firefox use-after-free in Graphics Canvas2DmediumCVSS 5.4EPSS 0.2%
- CVE-2026-109708: Firefox sandbox escape due to incorrect boundary conditions in NetworkingcriticalCVSS 9.6EPSS 0.3%
- CVE-2026-109707: Firefox sandbox escape in Networking component use-after-freecriticalCVSS 9.6EPSS 0.3%
- CVE-2026-92079: Mozilla Firefox mitigation bypass in Widget: Win32criticalCVSS 9.1EPSS 0.5%
- CVE-2026-92067: Mozilla Firefox use-after-free in Widget: Gtk componenthighCVSS 8.8EPSS 0.5%
- CVE-2026-92060: Mozilla Firefox use-after-free in Internationalization componenthighCVSS 8.8EPSS 0.5%
- CVE-2026-92058: Mozilla Firefox use-after-free in Graphics componenthighCVSS 8.8EPSS 0.5%
- CVE-2026-92057: Mozilla Firefox mitigation bypass in Enterprise Policies componentcriticalCVSS 9.1EPSS 0.5%
Most severe Mozilla Thunderbird-Esr vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2013-1690: Mozilla Firefox and Thunderbird Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2013-1675: Mozilla Firefox Information Disclosure Vulnerabilitycriticalexploited in the wildCVSS 6.5
- CVE-2026-75874: Mozilla Firefox Remote Settings Client sandbox escapecriticalCVSS 10EPSS 0.5%
- CVE-2026-4688: Mozilla Firefox and Thunderbird sandbox escape in Disability Access APIscriticalCVSS 10EPSS 0.4%
- CVE-2026-2768: Mozilla Firefox and Thunderbird sandbox escape in IndexedDBcriticalCVSS 10EPSS 0.4%
- CVE-2026-74964: Mozilla Firefox integer overflow in Graphics componentcriticalCVSS 9.8EPSS 0.7%
- CVE-2026-84141: Mozilla Firefox integer overflow in Graphics: ImageLibcriticalCVSS 9.8EPSS 0.6%
- CVE-2026-74988: Mozilla Thunderbird memory corruption in ESR 153.0 and 153criticalCVSS 9.8EPSS 0.6%
- CVE-2026-84134: Mozilla Firefox other issue in Profile Backup componentcriticalCVSS 9.8EPSS 0.6%
- CVE-2026-74985: Mozilla Firefox privilege escalation in Enterprise PoliciescriticalCVSS 9.8EPSS 0.5%
Vulnerabilities per week
20 vulnerabilities in the last four weeks, up 43% on the four before (14). 2 critical against 3. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 12 | 4 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 11 | 3 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 14 | 3 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 20 | 2 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Mozilla Thunderbird-Esr vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/thunderbird-esr)<a href="https://junglewise.ai/threats/technologies/thunderbird-esr"><img src="https://junglewise.ai/threats/technologies/thunderbird-esr/badge.svg" alt="Mozilla Thunderbird-Esr vulnerabilities" /></a>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-esr.json, and this page as text at https://junglewise.ai/threats/technologies/thunderbird-esr.md, 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-Esr vulnerabilities", https://junglewise.ai/threats/technologies/thunderbird-esr, 13 November 2026.