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CVE-2026-8389

8.8 HIGH

JIT miscompilation in the JavaScript Engine: JIT component

Published: 2026-05-12 · Last updated: 2026-06-05

Severity and scoring

CVSS
8.8 HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-119, CWE-686, CWE-843

Affected products

VendorProduct
mozillafirefox

Description

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

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-12330 — Incorrect boundary conditions in the Internationalization component (5.4 MEDIUM)
  • CVE-2026-12329 — Memory safety bug fixed in Thunderbird ESR 140.12 (5.3 MEDIUM)
  • CVE-2026-12328 — Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151 (8.1 HIGH)
  • CVE-2026-12323 — Spoofing issue in the DOM: Core & HTML component (5.4 MEDIUM)
  • CVE-2026-12322 — Clickjacking issue in the Widget: Gtk component (5.4 MEDIUM)

Same CWE

  • CVE-2026-12330 — Incorrect boundary conditions in the Internationalization component (5.4 MEDIUM)
  • CVE-2026-12329 — Memory safety bug fixed in Thunderbird ESR 140.12 (5.3 MEDIUM)
  • CVE-2026-12327 — Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151 (7.3 HIGH)
  • CVE-2026-12326 — Memory safety bugs present in Firefox 151 and Thunderbird 151 (7.3 HIGH)
  • CVE-2026-12318 — Incorrect boundary conditions in the Libraries component in NSS (7.3 HIGH)