PoC Index

CVE-2026-8389

HIGH 8.8EPSS 0.3%

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.

CVSS v3.1
7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v3.1
8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
0.33% chance of exploitation in the next 30 days, 26th percentile
Published
2026-05-12
Updated
2026-07-15

Proof-of-concept exploits (1)

References

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