CVE-2026-8390 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
mozilla	CNA	7.3 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Base Score

CVSS 3.x

EPSS Score

Percentile: 25.51%

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
mozilla	firefox	𝑥 < 150.0.3	CNA

Debian Releases

Debian Product

Codename

firefox

sid	156.0-1 fixed

Ubuntu Releases

Ubuntu Product

Codename

firefox

jammy	not-affected
noble	not-affected
questing	not-affected
resolute	not-affected

mozjs102

jammy	ignored
noble	ignored
questing	dne
resolute	dne

mozjs115

jammy	dne
noble	ignored
questing	dne
resolute	dne

mozjs38

bionic	needs-triage
jammy	dne
noble	dne
questing	dne
resolute	dne

mozjs52

bionic	ignored
focal	ignored
jammy	dne
noble	dne
questing	dne
resolute	dne

mozjs68

focal	ignored
jammy	dne
noble	dne
questing	dne
resolute	dne

mozjs78

jammy	ignored
noble	dne
questing	dne
resolute	dne

mozjs91

jammy	ignored
noble	dne
questing	dne
resolute	dne

thunderbird

jammy	needed
noble	not-affected
questing	not-affected
resolute	not-affected

Common Weakness Enumeration

CWE-416 - Use After Free
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CWE-825 - Expired Pointer Dereference
The program dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2038081

https://www.mozilla.org/security/advisories/mfsa2026-45/

https://access.redhat.com/security/cve/CVE-2026-8390

https://bugzilla.redhat.com/show_bug.cgi?id=2476474

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8390.json