CVE-2026-100761
Thunderbird: Privilege escalation due to use-after-free in the Graphics: WebGPU component
Mozilla Thunderbird
CVSS
8.8HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 12% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Text from CVE List
Affected versions 2
- Thunderbirdunaffected: 157CVE List
- Firefoxunaffected: 157CVE List