CVE-2026-109772 Details
Description
Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
A same-origin policy bypass vulnerability has been identified in the DevTools component of Mozilla Firefox. This issue allows for unauthorized access or manipulation of resources that should be restricted by the same-origin policy, potentially leading to security vulnerabilities such as cross-site scripting or data theft. The vulnerability affects Firefox versions prior to 158.
Users can upgrade to Firefox version 158 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 13, 2026CISA-ADP
Assessed Oct 26, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=2066063 | [email protected] | Issue TrackingPermission RequiredVendor |
| https://www.mozilla.org/security/advisories/mfsa2026-106/ | [email protected] | AdvisoryBundleVendor |
| https://www.mozilla.org/security/advisories/mfsa2026-109/ | [email protected] |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-346 | Origin Validation Error | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Mozilla Firefox | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 26, 2026 | CVE Modified | CISA-ADP |
| Oct 13, 2026 | CVE Modified | [email protected] |
| Oct 13, 2026 | New CVE Received | [email protected] |