CVE-2026-12295

criticalpriority · track · 10EPSS 0.004 · 33 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.39% (33rd) EPSS

CVSS 9.6 · critical

Is it mine?

25 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-26

Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

cvss

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

9.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.6

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.6criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 6

v3.17.5highCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondaryexploitability 1.6 · impact 5.9

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-653USCWE-693US

exploits (1)

Public proof-of-concept and weaponised exploit code.

SneakyNachos/CVE-2026-12295-UXXS-in-my-wasmFirefox content->parent srcdoc forge (N-day, bug 2040160): forged PDocumentChannel with SrcdocData on a non-about:srcdoc URI -> attacker HTML served at victim origin (UXSS), via mojo-port send-path injection from a compromised content processPoC · poc_in_github

affected products (25)

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:-
Mozilla Firefox <152all versionscert_bundDE
Mozilla Firefox ESR <115.37all versionscert_bundDE
Mozilla Firefox ESR <140.12all versionscert_bundDE
Mozilla Thunderbird <140.12all versionscert_bundDE
Mozilla Thunderbird <152all versionscert_bundDE
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:-
Red Hat Enterprise Linux 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:8
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Mozilla Firefox< 152cert_bundDE
Mozilla Firefox ESR< 115.37cert_bundDE
Mozilla Firefox ESR< 140.12cert_bundDE
Mozilla Thunderbird< 140.12cert_bundDE
Mozilla Thunderbird< 152cert_bundDE

showing 20 of 25

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1959Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere SchwachstellenDeutsch2026-06-16csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Mozilla Firefox ESR und Mozilla Thunderbird ausnutzen, um beliebigen Code auszuführen, erweiterte Berechtigungen zu erlangen, Speicherbeschädigungen zu verursachen, Sicherheitsmaßnahmen zu umgehen und aus der Sandbox auszubrechen, vertrauliche Informationen offenzulegen, Daten zu manipulieren und Denial-of-Service-Zustände auszulösen.

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 2026-06-16modified 2026-10-26

references (42)

External citations — patches, advisories, analysis.

scry

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