CVE-2026-74947: Vulnerability in Mozilla Firefox
Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
AI Analysis
Technical Summary
CVE-2026-74947 is a privilege escalation vulnerability caused by an invalid pointer in the Graphics component of Mozilla Firefox. This flaw could allow an attacker to gain elevated privileges within the browser context. The vulnerability was identified internally and reported by the researcher navapon. It was addressed and fixed in Firefox 154 and Firefox ESR 153.1 releases. The fix is part of a comprehensive security update that resolves multiple high-impact vulnerabilities across various Firefox components.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially leading to unauthorized actions or access to restricted browser functionality. The impact is rated high by Mozilla. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154 and Firefox ESR 153.1. Users and administrators should update to these versions or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
CVE-2026-74947: Vulnerability in Mozilla Firefox
Description
Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS v3.1
Score 8.8high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74947 is a privilege escalation vulnerability caused by an invalid pointer in the Graphics component of Mozilla Firefox. This flaw could allow an attacker to gain elevated privileges within the browser context. The vulnerability was identified internally and reported by the researcher navapon. It was addressed and fixed in Firefox 154 and Firefox ESR 153.1 releases. The fix is part of a comprehensive security update that resolves multiple high-impact vulnerabilities across various Firefox components.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially leading to unauthorized actions or access to restricted browser functionality. The impact is rated high by Mozilla. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154 and Firefox ESR 153.1. Users and administrators should update to these versions or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:57:53.297Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- 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: 08/18/2026, 14:21:33 UTC
Last updated: 08/19/2026, 01:31:36 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.