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High 7.3Published May 7, 2026
CVE-2026-8090Use-after-free in the DOM: Networking component
Updated under an hour ago ()
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It affects Mozilla Firefox and 9 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.3 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- Weakness (CWE)
- CWE-416, CWE-825
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mozilla
- NVD analysis
- Modified
- Record last updated
- Jul 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Mozilla Firefox mozilla:firefox (from the name) | 115.35.2 builds before 115.* not affected; 140.10.2 builds before 140.* not affected; from 150.0.2 not affected | CNA record |
Mozilla Thunderbird mozilla:thunderbird (from the name) | 140.10.2 builds before 140.* not affected; from 150.0.2 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:140.10.2-1.el10_2 not affected | CISA ADP |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:140.10.2-1.el10_0 not affected | CISA ADP |
from 0:140.10.2-1.el7_9 not affected | CISA ADP | |
from 0:140.10.2-1.el8_4 not affected | CISA ADP | |
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On redhat:rhel_eus_long_life | from 0:140.10.2-1.el8_4 not affected | CISA ADP |
from 0:140.10.2-1.el8_8 not affected | CISA ADP | |
from 0:140.10.2-1.el8_8 not affected | CISA ADP | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:140.10.2-1.el9_6 not affected | CISA ADP |
mozilla firefox mozilla:firefox | before 115.35.2; before 150.0.2; from 128.0 before 140.10.2 | NVD |
mozilla thunderbird mozilla:thunderbird | before 140.10.2; before 150.0.2 | NVD |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2034352permissions-required
- https://www.mozilla.org/security/advisories/mfsa2026-40/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2026-41/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2026-42/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2026-43/vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2026-44/vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:19160
- https://access.redhat.com/errata/RHSA-2026:20566
- https://access.redhat.com/errata/RHSA-2026:20574
- https://access.redhat.com/errata/RHSA-2026:21381
- https://access.redhat.com/errata/RHSA-2026:22325
- https://access.redhat.com/errata/RHSA-2026:22643
- https://access.redhat.com/errata/RHSA-2026:24508
- https://access.redhat.com/errata/RHSA-2026:24509
- https://access.redhat.com/errata/RHSA-2026:24510
- https://access.redhat.com/errata/RHSA-2026:24511
- https://access.redhat.com/errata/RHSA-2026:24516
- https://access.redhat.com/errata/RHSA-2026:24755
- https://access.redhat.com/errata/RHSA-2026:24983
- https://access.redhat.com/errata/RHSA-2026:25015
- https://access.redhat.com/errata/RHSA-2026:26174
- https://access.redhat.com/errata/RHSA-2026:26268
- https://access.redhat.com/errata/RHSA-2026:26269
- https://access.redhat.com/errata/RHSA-2026:26270
- https://access.redhat.com/errata/RHSA-2026:26521
The CVE record on cve.org NVD's entry
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