CVE-2026-16353

Analyzed Analyzed - Analysis Complete

DOM Pointer Dereference in Mozilla Firefox

Publication date: 2026-07-21

Last updated on: 2026-07-24

Assigner: Mozilla Corporation

Description

Invalid pointer in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-21

Last Modified

2026-07-24

Generated

2026-08-11

AI Q&A

2026-07-21

EPSS Evaluated

2026-08-09

NVD

CVE-2026-16353

EUVD

EUVD-2026-46198

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 153.0.0 (exc)
mozilla	firefox	to 115.38.0 (exc)
mozilla	firefox	From 128.1.0 (inc) to 140.13.0 (exc)
mozilla	thunderbird	to 140.13.0 (exc)
mozilla	thunderbird	From 141.0 (inc) to 153.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-824	The product accesses or uses a pointer that has not been initialized.
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability involves an invalid pointer in the DOM Bindings (WebIDL) component of Firefox. It was patched in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13.

Detection Guidance

This vulnerability is specific to Firefox browsers and can be detected by checking the installed version of Firefox or Firefox ESR. If the version is below Firefox 153, Firefox ESR 115.38, or Firefox ESR 140.13, the system is vulnerable. Use commands like 'firefox --version' or 'apt show firefox' to check the version.

Impact Analysis

An invalid pointer could lead to crashes, unexpected behavior, or potential code execution if exploited. Users running unpatched versions may be at risk.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. Without additional context on data exposure or processing implications, its effect on compliance cannot be determined.

Mitigation Strategies

Update Firefox to version 153 or later, Firefox ESR to version 115.38 or later, or Firefox ESR to version 140.13 or later. Disable automatic updates temporarily if needed, but prioritize updating to the patched versions as soon as possible.

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