CVE-2026-84142
EUVD-2026-6909001.09.2026, 13:20
Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155 and Thunderbird 155.Enginsight
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
| Vendor | Product | Version | Source |
|---|---|---|---|
| mozilla | firefox | 𝑥 < 155.0.0 | CNA |
| mozilla | thunderbird | 𝑥 < 155.0 | CNA |
Ubuntu Releases
Ubuntu Product | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| firefox |
| ||||||||||
| thunderbird |
| ||||||||||
| mozjs38 |
| ||||||||||
| mozjs52 |
| ||||||||||
| mozjs68 |
| ||||||||||
| mozjs78 |
| ||||||||||
| mozjs91 |
| ||||||||||
| mozjs102 |
| ||||||||||
| mozjs115 |
|
Common Weakness Enumeration
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory BufferThe software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
- CWE-200 - Exposure of Sensitive Information to an Unauthorized ActorThe product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
References