CVE-2026-92059
published 2026-09-15CVE-2026-92059: Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird…
PriorityP348critical9.3CVSS 3.1
AVLACLPRNUINSCCHIHAH
EPSS
0.11%
1.4th percentile
Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 156 | Firefox 156 |
| mozilla | firefox | < 153.3.0 | 153.3.0 |
| mozilla | firefox | >= 154.0.0 < 156.0.0 | 156.0.0 |
| mozilla | firefox_esr | < Firefox ESR 153.3 | Firefox ESR 153.3 |
| mozilla | thunderbird | < Thunderbird 156 | Thunderbird 156 |
| mozilla | thunderbird | < Thunderbird 153.3 | Thunderbird 153.3 |
| mozilla | thunderbird | < 153.3.0 | 153.3.0 |
| mozilla | thunderbird | >= 154.0 < 156.0 | 156.0 |
CVSS provenance
nvdv3.19.3CRITICALCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
vendor_redhat6.1MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
firefox: thunderbird: Incorrect boundary conditions in the DOM: Editor component
vendor_redhat·2026-09-15·CVSS 6.1
CVE-2026-92059 [MEDIUM] CWE-787 firefox: thunderbird: Incorrect boundary conditions in the DOM: Editor component
firefox: thunderbird: Incorrect boundary conditions in the DOM: Editor component
Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Incorrect boundary conditions in the DOM: Editor component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: thunderbird (R
Mozilla
Mozilla Foundation Security Advisory 2026-94: CVE-2026-92059
vendor_mozilla
CVE-2026-92059 Mozilla Foundation Security Advisory 2026-94: CVE-2026-92059
Mozilla Foundation Security Advisory 2026-94
CVE: CVE-2026-92059
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 156
Mozilla
Mozilla Foundation Security Advisory 2026-90: CVE-2026-92059
vendor_mozilla
CVE-2026-92059 Mozilla Foundation Security Advisory 2026-90: CVE-2026-92059
Mozilla Foundation Security Advisory 2026-90
CVE: CVE-2026-92059
Product: Firefox
Impact: low
Fixed in: Firefox 156
Mozilla
Mozilla Foundation Security Advisory 2026-96: CVE-2026-92059
vendor_mozilla
CVE-2026-92059 Mozilla Foundation Security Advisory 2026-96: CVE-2026-92059
Mozilla Foundation Security Advisory 2026-96
CVE: CVE-2026-92059
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.3
Mozilla
Mozilla Foundation Security Advisory 2026-93: CVE-2026-92059
vendor_mozilla
CVE-2026-92059 Mozilla Foundation Security Advisory 2026-93: CVE-2026-92059
Mozilla Foundation Security Advisory 2026-93
CVE: CVE-2026-92059
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.3
GHSA
Incorrect boundary conditions in the DOM: Editor component.
ghsa_unreviewed·2026-09-15
CVE-2026-92059 Incorrect boundary conditions in the DOM: Editor component.
Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
No detection rules found.
No public exploits indexed.
2026-09-15
Published