VulnerabilityModified
CVE-2026-8090
Use-after-free in the DOM: Networking component.
HIGH 7.3EPSS 0.32%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 0.32% probability · 24th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416, CWE-825
- Affected
- mozilla/firefox · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 0.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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
- https://access.redhat.com/errata/RHSA-2026:26536
- https://access.redhat.com/errata/RHSA-2026:26539
- https://access.redhat.com/security/cve/CVE-2026-8090
- https://bugzilla.redhat.com/show_bug.cgi?id=2467709
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8090.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.