CVE-2026-2799
CRITICALCVSS v3.1: 9.8 · EPSS: 0.0031 (22.5 percentile)
Source data as of:
At a glance
- Severity
- CRITICAL
- CVSS
- 9.8 v3.1 · NVD
- EPSS
- 0.0031 (22.5 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Use After Free · NVD CWE
- Attack conditions (CVSS vector)
- NetworkNo privilegesNo user interaction · Source: NVD Vector
- Affected vendors
- mozilla
- Published
- 2026-02-24 · Modified: 2026-06-30
- References
- Jump to references (6)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
Description
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Reference https://bugzilla.mozilla.org/show_bug.cgi?id=2014551
- Vendor advisory https://www.mozilla.org/security/advisories/mfsa2026-13/
- Vendor advisory https://www.mozilla.org/security/advisories/mfsa2026-16/
- Distro https://access.redhat.com/security/cve/CVE-2026-2799
- Distro https://bugzilla.redhat.com/show_bug.cgi?id=2442303
- Distro https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2799.json