Mitigation bypass in the DOM: Security component (Mozilla Firefox)

CVE-2026-109746

HIGH 7.3

At a glance

Source: NVD
EPSS: EPSS 0.30 % · percentile 23 (2026-10-31)
State: PUBLISHED
Published: 2026-10-13 12:29 UTC
Updated: 2026-10-19 12:21 UTC
Assigner: mozilla
NVD status: Deferred

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Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

Weaknesses (CWE)

CWE-693 — Protection Mechanism Failure

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	CISA-ADP
CVSS 3.1	HIGH 7.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

European references

ENISA EUVD · EUVD-2026-98508
GCVE · GCVE-0-2026-109746

CERT-FR advisories

CERTFR-2026-AVI-1305 — Multiples vulnérabilités dans les produits Mozilla · cert.ssi.gouv.fr

Affected products

Product	Versions
Mozilla · Firefox	unaffected 158 ≤ *
Mozilla · Thunderbird	unaffected 158 ≤ *

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD