CVE-2026-92047

Received Received - Intake

Privilege Escalation in Firefox Crash Reporting

Publication date: 2026-09-15

Last updated on: 2026-10-05

Assigner: Mozilla Corporation

Description

Privilege escalation in the Crash Reporting component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-15

Last Modified

2026-10-05

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-92047

EUVD

EUVD-2026-78510

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	thunderbird	From 154.0 (inc) to 156.0 (exc)
mozilla	firefox	to 153.3.0 (exc)
mozilla	firefox	From 154.0.0 (inc) to 156.0.0 (exc)
mozilla	thunderbird	to 153.3.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

This is a privilege escalation vulnerability in Firefox's Crash Reporting component. It allows an attacker to gain higher privileges than intended, potentially taking control of the affected system. The issue was resolved in Firefox version 156 and Firefox ESR version 153.3.

Detection Guidance

This vulnerability is specific to Firefox versions before 156 and Firefox ESR before 153.3. To detect it, check the installed version of Firefox or Firefox ESR on your system. For Firefox, run: firefox --version. For Firefox ESR, run: firefox --version or check your package manager (e.g., apt list --installed | grep firefox). If the version is below 156 or 153.3 respectively, the system is vulnerable.

Impact Analysis

An attacker could exploit this to gain unauthorized access, install malware, steal data, or perform actions with elevated permissions. Users running vulnerable versions of Firefox are at risk if the attacker can trick them into visiting a malicious site or opening a crafted file.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with GDPR, HIPAA, or other standards. The vulnerability involves privilege escalation in Firefox's Crash Reporting component, which could potentially lead to unauthorized access or data exposure. However, specific compliance implications are not detailed in the given context.

Mitigation Strategies

Update Firefox to version 156 or later and Firefox ESR to version 153.3 or later to address the privilege escalation vulnerability in the Crash Reporting component.

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