Use-after-free in the JavaScript: GC component
33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 5.4epss 0.2%
from disclosure to weapon7 days
Published on NVDSep 1
1st PoC+7d
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
public PoCs found — 1
githubgithub.com/SneakyNachos/CVE-2026-84118-who-labeled-the-crit-as-a-high★ 1⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.