CVE-2026-16365

highpriority · track · 0EPSS 0.003 · 20 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.28% (20th) EPSS

CVSS 8.8 · high

Is it mine?

29 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-27

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153, Thunderbird 153, Firefox ESR 140.15, and Thunderbird 140.15.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-269USCWE-284US

affected products (29)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
IGEL OSall versionscert_bundDEcpe:/o:igel:os:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Mozilla Firefox< 155cert_bundDE
Mozilla Firefox ESR< 115.40cert_bundDE
Mozilla Firefox ESR< 140.15cert_bundDE
Mozilla Firefox ESR< 153.2cert_bundDE
Mozilla Mozilla Firefox <153< 153cert_bundDE
Mozilla Mozilla Firefox <155< 155cert_bundDE
Mozilla Mozilla Firefox ESR <115.38< 115.38cert_bundDE
Mozilla Mozilla Firefox ESR <115.40< 115.40cert_bundDE
Mozilla Mozilla Firefox ESR <140.13< 140.13cert_bundDE
Mozilla Mozilla Firefox ESR <140.15< 140.15cert_bundDE
Mozilla Mozilla Firefox ESR <153.2< 153.2cert_bundDE
Mozilla Mozilla Thunderbird <140.13< 140.13cert_bundDE

showing 20 of 29

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2458Mozilla Firefox und Thunderbird: Mehrere SchwachstellenDeutsch2026-07-21csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Mozilla Thunderbird ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Berechtigungen zu erweitern, Sandbox-Escapes durchzuführen, Daten zu manipulieren, einen Denial-of-Service-Zustand auszulösen oder Speicherbeschädigungen zu verursachen.
WID-SEC-W-2026-3132Mozilla Firefox und Thunderbird: Mehrere SchwachstellenDeutsch2026-09-01csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Thunderbird ausnutzen, um Berechtigungen zu erweitern, Sicherheitsmaßnahmen zu umgehen, sensible Informationen offenzulegen, Daten zu manipulieren, Spoofing-Angriffe durchzuführen, möglicherweise durch Speicherbeschädigungen beliebigen Code auszuführen oder Denial-of-Service-Zustände herbeizuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-07-21modified 2026-10-24

references (10)

External citations — patches, advisories, analysis.

scry

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