CVE-2026-6750: Vulnerability in Mozilla Firefox
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
AI Analysis
Technical Summary
CVE-2026-6750 is a privilege escalation vulnerability identified in the Graphics: WebRender component of Mozilla Firefox and Thunderbird. The vulnerability was reported by choeseyeong and is tracked under Bug 2023407. It has a CVSS v3.1 score of 8.8, reflecting high impact with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. Mozilla fixed this vulnerability in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. The vendor advisories confirm the fix and recommend updating to these versions.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox or Thunderbird process, potentially leading to full compromise of the affected application. The CVSS score of 8.8 indicates a high impact on confidentiality, integrity, and availability. However, there are no known exploits in the wild currently. The vulnerability affects multiple Mozilla products including Firefox and Thunderbird prior to the fixed versions.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. Users and administrators should upgrade to these versions or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisories.
CVE-2026-6750: Vulnerability in Mozilla Firefox
Description
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
CVSS v3.1
Score 8.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6750 is a privilege escalation vulnerability identified in the Graphics: WebRender component of Mozilla Firefox and Thunderbird. The vulnerability was reported by choeseyeong and is tracked under Bug 2023407. It has a CVSS v3.1 score of 8.8, reflecting high impact with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. Mozilla fixed this vulnerability in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. The vendor advisories confirm the fix and recommend updating to these versions.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox or Thunderbird process, potentially leading to full compromise of the affected application. The CVSS score of 8.8 indicates a high impact on confidentiality, integrity, and availability. However, there are no known exploits in the wild currently. The vulnerability affects multiple Mozilla products including Firefox and Thunderbird prior to the fixed versions.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. Users and administrators should upgrade to these versions or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-21T12:40:47.165Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-30/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-31/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-32/","vendor":"Mozilla"}]
Threat ID: 69e7789819fe3cd2cdd16257
Added to database: 4/21/2026, 1:16:08 PM
Last enriched: 5/27/2026, 7:58:28 PM
Last updated: 6/5/2026, 11:51:16 AM
Views: 87
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