CVE-2026-8090
Use-after-free in the DOM: Networking component
CVSS Score
7.3
EPSS Score
0.3%
EPSS Percentile
24th
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.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | May 7, 2026 |
| Last Updated | Jul 29, 2026 |
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Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2034352 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-40/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-41/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-42/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-43/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-44/ access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-8090 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2467709 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8090.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24983 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24511 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26539 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19160 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22325 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:20566 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22643 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24516 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26270 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25015 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26536 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24755 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26268 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24509 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26269 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24510 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26174 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24508 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26521 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:20574 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:21381
Credits
Kevin Brosnan