CVE-2026-15719
Site isolation issue in the DOM: Navigation component
Description
We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.
INFO
Published Date :
July 14, 2026, 1:18 p.m.
Last Modified :
July 22, 2026, 8:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Firefox to version 152.0.6 or later.
- Apply vendor patches promptly.
- Monitor for exploit activity.
Public PoC/Exploit Available at Github
CVE-2026-15719 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-15719.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-15719 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-15719
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Daily reports for you
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-15719 vulnerability anywhere in the article.
-
security.nl
Mozilla dicht kritieke Firefox-lekken een week later ook in ESR-versies
Mozilla heeft twee kritieke kwetsbaarheden in Firefox die remote code execution (RCE) mogelijk maken, en waarvoor publieke exploitcode bestaat, een week later ook in de ESR-versies van de browser gedi ... Read more
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security.nl
Mozilla waarschuwt voor kritieke Firefox-lekken met publieke exploitcode
Mozilla waarschuwt voor twee kritieke beveiligingslekken in Firefox waardoor aanvallers malafide code op de systemen van gebruikers kunnen uitvoeren. Exploitcode om misbruik van de beveiligingslekken ... Read more
The following table lists the changes that have been made to the
CVE-2026-15719 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
Jul. 22, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'Mozilla', 'product': 'Firefox', 'versions': [{'status': 'unaffected', 'version': '115.38', 'versionType': 'rpm', 'lessThanOrEqual': '115.*'}, {'status': 'unaffected', 'version': '140.13', 'versionType': 'rpm', 'lessThanOrEqual': '140.*'}, {'status': 'unaffected', 'version': '152.0.6', 'versionType': 'rpm', 'lessThanOrEqual': '*'}]}] [{'vendor': 'Mozilla', 'product': 'Firefox', 'versions': [{'status': 'unaffected', 'version': '115.38', 'versionType': 'rpm', 'lessThanOrEqual': '115.*'}, {'status': 'unaffected', 'version': '140.13', 'versionType': 'rpm', 'lessThanOrEqual': '140.*'}, {'status': 'unaffected', 'version': '152.0.6', 'versionType': 'rpm', 'lessThanOrEqual': '*'}]}, {'vendor': 'Mozilla', 'product': 'Thunderbird', 'versions': [{'status': 'unaffected', 'version': '140.13', 'versionType': 'rpm', 'lessThanOrEqual': '*'}]}] Changed Description We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, and Firefox ESR 140.13. We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13. Added Reference https://www.mozilla.org/security/advisories/mfsa2026-72/ -
CVE Modified by [email protected]
Jul. 21, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'Mozilla', 'product': 'Firefox', 'versions': [{'status': 'unaffected', 'version': '152.0.6', 'versionType': 'rpm', 'lessThanOrEqual': '*'}]}] [{'vendor': 'Mozilla', 'product': 'Firefox', 'versions': [{'status': 'unaffected', 'version': '115.38', 'versionType': 'rpm', 'lessThanOrEqual': '115.*'}, {'status': 'unaffected', 'version': '140.13', 'versionType': 'rpm', 'lessThanOrEqual': '140.*'}, {'status': 'unaffected', 'version': '152.0.6', 'versionType': 'rpm', 'lessThanOrEqual': '*'}]}] Changed Description We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6. We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6, Firefox ESR 115.38, and Firefox ESR 140.13. Added Reference https://www.mozilla.org/security/advisories/mfsa2026-69/ Added Reference https://www.mozilla.org/security/advisories/mfsa2026-70/ -
Initial Analysis by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* versions up to (excluding) 152.0.6 Added Reference Type Mozilla Corporation: https://bugzilla.mozilla.org/show_bug.cgi?id=2043820 Types: Permissions Required Added Reference Type Mozilla Corporation: https://www.mozilla.org/security/advisories/mfsa2026-67/ Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Added SSVC {'id': 'CVE-2026-15719', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-14T13:32:24.747872Z'} -
New CVE Received by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Mozilla', 'product': 'Firefox', 'versions': [{'status': 'unaffected', 'version': '152.0.6', 'versionType': 'rpm', 'lessThanOrEqual': '*'}]}] Added Description We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6. Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=2043820 Added Reference https://www.mozilla.org/security/advisories/mfsa2026-67/