Is CVE-2026-8090 in the CISA KEV catalog?

No. CVE-2026-8090 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-8090?

CVE-2026-8090 has a CVSS v3 base score of 7.3 (HIGH).

What is the EPSS score for CVE-2026-8090?

CVE-2026-8090 has an EPSS score of 0.32% (24th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8090?

Upgrade firefox on debian unstable to 150.0.2-1 or later. Fixes are available for 12 affected products.

CVE & CISA-KEV Catalog

CVE-2026-8090

HIGH

7.3

CVSS v3

NVD

Description

Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.

CWE-416Use After Free CWE-825

How to fix

Remediation Available

firefoxDebian

Fixed in:150.0.2-1CVE-2026-8090

firefoxRocky

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el7_9RHSA-2026:24983

Fixed in:0:140.10.2-1.el7_9.ppc64RHSA-2026:24983

Fixed in:0:140.10.2-1.el7_9RHSA-2026:24983

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_4RHSA-2026:24516

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_6RHSA-2026:25015

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_4RHSA-2026:24516

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

firefoxRed Hat / RHEL

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el7_9RHSA-2026:24983

Fixed in:0:140.10.2-1.el7_9.ppc64RHSA-2026:24983

Fixed in:0:140.10.2-1.el7_9RHSA-2026:24983

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_6RHSA-2026:25015

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_4RHSA-2026:24516

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

firefox-debuginfoRed Hat / RHEL

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el7_9RHSA-2026:24983

Fixed in:0:140.10.2-1.el7_9.ppc64RHSA-2026:24983

Fixed in:0:140.10.2-1.el8_4RHSA-2026:24516

Fixed in:0:140.10.2-1.el8_6RHSA-2026:25015

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

firefox-debuginfoRocky

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el7_9RHSA-2026:24983

Fixed in:0:140.10.2-1.el7_9.ppc64RHSA-2026:24983

Fixed in:0:140.10.2-1.el7_9RHSA-2026:24983

Fixed in:0:140.10.2-1.el8_4RHSA-2026:24516

Fixed in:0:140.10.2-1.el8_6RHSA-2026:25015

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

firefox-debugsourceRocky

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el8_6RHSA-2026:25015

Fixed in:0:140.10.2-1.el8_4RHSA-2026:24516

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

firefox-debugsourceRed Hat / RHEL

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el10_2RHSA-2026:19160

Fixed in:0:140.10.2-1.el10_0RHSA-2026:24511

Fixed in:0:140.10.2-1.el8_4RHSA-2026:24516

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_8RHSA-2026:24755

Fixed in:0:140.10.2-1.el8_10RHSA-2026:20566

Fixed in:0:140.10.2-1.el8_6RHSA-2026:25015

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

firefox-x11Rocky

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

firefox-x11Red Hat / RHEL

Fixed in:0:140.10.2-1.el9_6RHSA-2026:24508

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_8RHSA-2026:20574

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

Fixed in:0:140.10.2-1.el9_4RHSA-2026:24510

Fixed in:0:140.10.2-1.el9_2RHSA-2026:24509

DeveloperEditionWindows application

Affected:150.0.2Fixed in:150.0.2Mozilla

Affected:115.35.2Fixed in:115.35.2Mozilla

Affected:128.0 140.10.2Fixed in:140.10.2Mozilla

Mozilla Firefox (en-US)Windows application

Affected:128.0 140.10.2Fixed in:140.10.2Mozilla

Affected:150.0.2Fixed in:150.0.2Mozilla

Affected:115.35.2Fixed in:115.35.2Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:140.10.2Fixed in:140.10.2Mozilla

Affected:150.0.2Fixed in:150.0.2Mozilla

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Exploit Intelligence

0.32%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-0708	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-31166	Critical	9.8	100%	KEV	Fix
CVE-2015-5119	Critical	9.8	99%	KEV	-
CVE-2010-3962	High	8.1	97%	KEV	-
CVE-2015-0313	Critical	9.8	96%	KEV	Fix
CVE-2017-9798	High	7.5	95%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-15.