CVE-2026-100803 Same-origin policy bypass in the WebExtensions component
| Reporter | Title | Published | Views | Family All 4 |
|---|---|---|---|---|
 | CVE-2026-100803 | 29 Sep 202612:36 | – | cve |
 | EUVD-2026-88956 | 29 Sep 202612:36 | – | euvd |
 | Security Vulnerabilities fixed in Firefox ESR 115.42 — Mozilla | 29 Sep 202600:00 | – | mozilla |
 | CVE-2026-100803 | 29 Sep 202613:17 | – | nvd |
[
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"status": "unaffected",
"version": "115.42",
"lessThanOrEqual": "115.*",
"versionType": "rpm"
},
{
"status": "unaffected",
"version": "140.17",
"lessThanOrEqual": "140.*",
"versionType": "rpm"
},
{
"status": "unaffected",
"version": "153.4",
"lessThanOrEqual": "153.*",
"versionType": "rpm"
},
{
"status": "unaffected",
"version": "157",
"lessThanOrEqual": "*",
"versionType": "rpm"
}
]
}
]Data
Build on a solid foundation with Vulners data
We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data
Api
Power your application with Vulners API
The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access
App
Assess and manage vulnerabilities with Vulners tools
Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation
29 Sep 2026 12:36Current