CVE-2026-3889 :: Enginsight Vulnerability Database

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6.5 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 8%

Affected Products (NVD)

Vendor	Product	Version
mozilla	thunderbird_esr	𝑥 < 140.9.0
mozilla	thunderbird	𝑥 < 149.0

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

thunderbird

bookworm	vulnerable
bookworm (security)	1:140.10.1esr-1~deb12u1 fixed
bullseye	vulnerable
bullseye (security)	1:140.10.1esr-1~deb11u1 fixed
forky	1:140.10.1esr-1 fixed
sid	1:140.10.1esr-1 fixed
trixie	vulnerable
trixie (security)	1:140.10.1esr-1~deb13u1 fixed

Ubuntu Releases

Ubuntu Product

Codename

firefox

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

thunderbird

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

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

mozjs102

jammy	ignored
noble	ignored
questing	dne
resolute	dne

mozjs115

jammy	dne
noble	ignored
questing	dne
resolute	dne

openSUSE / SLES Releases

openSUSE Product

Release

MozillaThunderbird

suse enterprise desktop 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise sap 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise server 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise workstation 15 SP7	140.9.0-150200.8.263.1 fixed

MozillaThunderbird-translations-common

suse enterprise desktop 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise sap 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise server 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise workstation 15 SP7	140.9.0-150200.8.263.1 fixed

MozillaThunderbird-translations-other

suse enterprise desktop 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise sap 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise server 15 SP7	140.9.0-150200.8.263.1 fixed
suse enterprise workstation 15 SP7	140.9.0-150200.8.263.1 fixed

Red Hat Enterprise Linux Releases

Red Hat Product

Release

thunderbird

RHEL 9

0:140.9.0-1.el9_7

fixed

Common Weakness Enumeration

CWE-451 - User Interface (UI) Misrepresentation of Critical Information
The user interface (UI) does not properly represent critical information to the user, allowing the information - or its source - to be obscured or spoofed. This is often a component in phishing attacks.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2020723

https://www.mozilla.org/security/advisories/mfsa2026-23/

https://www.mozilla.org/security/advisories/mfsa2026-24/