CVE-2026-117864

0.0

Sandbox escape in the Form Manager component

Overview

Description

Sandbox escape in the Form Manager component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Details

INFO

Published Date :

Oct. 27, 2026, 2:16 p.m.

Last Modified :

Oct. 27, 2026, 7:17 p.m.

Remotely Exploit :

No

Source :

[email protected]

Impact

Affected Products

The following products are affected by CVE-2026-117864 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product	Action
1	Mozilla	firefox
2	Mozilla	thunderbird

: Total Affected Vendor : 1 | Products : 2

References

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-2026-117864.

URL	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2058614
https://www.mozilla.org/security/advisories/mfsa2026-118/
https://www.mozilla.org/security/advisories/mfsa2026-120/
https://www.mozilla.org/security/advisories/mfsa2026-121/
https://www.mozilla.org/security/advisories/mfsa2026-122/

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-117864 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-2026-117864 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).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-117864 vulnerability anywhere in the article.

TheCyberThrone

Mozilla Firefox Security Update Fixes 167 Vulnerabilities

Mozilla’s Firefox 159 release, published on October 27, 2026, addresses 167 security vulnerabilities across the browser.The security advisory identifies 108 High-severity, 52 Moderate-severity, and se ...

Published Date: Oct 29, 2026 (10 hours, 5 minutes ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-117864 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.

CVE Modified by [email protected]

Oct. 27, 2026

Action	Type	Old Value	New Value
Changed	Description	Sandbox escape in the Form Manager component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.	Sandbox escape in the Form Manager component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Added	Affected		Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/117xxx/CVE-2026-117864.json">CVE-2026-117864</a>
Added	Reference		https://www.mozilla.org/security/advisories/mfsa2026-121/
Added	Reference		https://www.mozilla.org/security/advisories/mfsa2026-122/

New CVE Received by [email protected]