CVE-2026-74949
HIGH
MEDIUM
Priority: 0.04
BB Relevance:
68/100
Published: 2026-08-18
Modified: 2026-10-28
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Required
S:
Unchanged
C:
High
I:
High
A:
High
Description
Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Weakness Classification (1)
Affected Software (8)
| Vendor | Product | Version |
|---|---|---|
| mozilla | firefox | < 140.14.0 |
| mozilla | firefox | 141.0.0 – 153.1.0 |
| mozilla | firefox | < 140.14.0 |
| mozilla | firefox | 141.0.0 – 153.1.0 |
| mozilla | thunderbird | < 140.14.0 |
| mozilla | thunderbird | 141.0 – 153.1.0 |
| mozilla | thunderbird | < 140.14.0 |
| mozilla | thunderbird | 141.0 – 153.1.0 |
References & Advisories (7)
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
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