CVE-2026-74947: Vulnerability in Mozilla Firefox
CVE-2026-74947 is a high-severity privilege escalation vulnerability in Mozilla Firefox caused by an invalid pointer in the Graphics component. This flaw allows an attacker to escalate privileges within the affected application. The vulnerability was fixed in Firefox version 154 and Firefox ESR 153.1.
AI Analysis
Technical Summary
CVE-2026-74947 is a privilege escalation vulnerability resulting from an invalid pointer in the Graphics component of Mozilla Firefox. This vulnerability could allow an attacker to gain elevated privileges within the browser environment. Mozilla addressed and fixed this issue in Firefox 154 and Firefox ESR 153.1, as well as in Thunderbird 154 and Thunderbird 153.1.
Potential Impact
Successful exploitation of this vulnerability could lead to privilege escalation, potentially allowing an attacker to execute code with higher privileges than intended. The CVSS v3.1 score is 8.8 (high), indicating a significant impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official patches.
CVE-2026-74947: Vulnerability in Mozilla Firefox
Description
CVE-2026-74947 is a high-severity privilege escalation vulnerability in Mozilla Firefox caused by an invalid pointer in the Graphics component. This flaw allows an attacker to escalate privileges within the affected application. The vulnerability was fixed in Firefox version 154 and Firefox ESR 153.1.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74947 is a privilege escalation vulnerability resulting from an invalid pointer in the Graphics component of Mozilla Firefox. This vulnerability could allow an attacker to gain elevated privileges within the browser environment. Mozilla addressed and fixed this issue in Firefox 154 and Firefox ESR 153.1, as well as in Thunderbird 154 and Thunderbird 153.1.
Potential Impact
Successful exploitation of this vulnerability could lead to privilege escalation, potentially allowing an attacker to execute code with higher privileges than intended. The CVSS v3.1 score is 8.8 (high), indicating a significant impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:57:53.297Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/","vendor":"Mozilla"}]
Threat ID: 6a845504c6e8be03323673c1
Added to database: 08/18/2026, 12:50:12 UTC
Last enriched: 09/11/2026, 22:03:06 UTC
Last updated: 10/03/2026, 02:46:06 UTC
Views: 50
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