Vulnerability Database · Debian · Package report
thunderbird: vulnerability history, versions and safety
thunderbird is a package in the Debian ecosystem. Vulert records 337 vulnerabilities for it across 120 releases, from Nov -0001 to Jul 2026. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.
No patched version yet — these are the ones to plan around.
See the unfixed vulnerabilities →No published version shipped hostile code.
Vulert verdict on thunderbird i
Updated on 23 Oct 2026
Careful: 6 of the 337 vulnerabilities Vulert records for this package have no fix yet. Plan around those, or apply the workaround listed for each. The rest have a fixed version to move to.
What to do: Plan around the 6 vulnerabilities with no published fix: each lists the affected range and any workaround that reduces exposure. No fix yet: Vulert alerts you the moment one is published. Monitor it with Vulert →
- Vulnerabilities on record 337 over 2026 years · 12 in the last year i
- Latest disclosure 22 Jul 2026 i
- Highest CVSS 9.8 i
- With no published fix 6 i
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01 Versions
Which versions are affected
Every version Vulert holds for thunderbird, newest first, with the vulnerabilities that name it. A version with a count of zero has no recorded vulnerabilities; open a version to see the vulnerabilities it is exposed to.
Newest 120 of 339 versions on record. Severity counts are the vulnerabilities recorded against that exact release.
02 Disclosure history
How often vulnerabilities are recorded
Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 12 of the 337 were recorded in the last 12 months.
Other ways into the data
03 Vulnerabilities
Recorded vulnerabilities for thunderbird
| Vulnerability | Severity | Fixed version ↓ | Disclosed ↓ |
|---|---|---|---|
| Heap Buffer Overflow in Thunderbird: CVE-2019-11704 | 9.8 critical | 1:60.7.1-1 | 23 Jul 2019 |
| Heap Overflow Vulnerability in Thunderbird - CVE-2021-43529 | 9.8 critical | 1:91.4.1-1~deb11u1 | 16 Feb 2023 |
| Heap Buffer Overflow in Thunderbird iCal Parser - CVE-2019-11703 | 9.8 critical | 1:60.7.1-1 | 23 Jul 2019 |
| Use-After-Free Vulnerability in Thunderbird Sound Notification Handling | 9.8 critical | 1:60.5.0-1 | 26 Apr 2019 |
| Critical Memory Safety Vulnerability in Thunderbird: CVE-2018-5187 | 9.8 critical | 1:60.0-1 | 18 Oct 2018 |
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Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315
