Integer overflow in the Graphics component. (CVE-2026-74964)
An integer overflow vulnerability exists in the Graphics component of Firefox. This vulnerability has been assigned CVE-2026-74964 and is rated critical with a CVSS score of 9.8. The issue was fixed in Firefox 154 and Firefox ESR versions 140.14 and 153.1. The vulnerability could potentially lead to high impact outcomes including confidentiality, integrity, and availability compromises. The vendor advisory confirms the fix is available in these versions.
AI Analysis
Technical Summary
CVE-2026-74964 is an integer overflow vulnerability in the Graphics component of Firefox. The flaw was identified internally and fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. The vulnerability has a critical severity rating with a CVSS 3.1 base score of 9.8, indicating it can be exploited remotely without privileges or user interaction, resulting in high impact on confidentiality, integrity, and availability. The Mozilla Foundation security advisories MFSA2026-74 and MFSA2026-76 provide detailed information and confirm the availability of patches in the stated Firefox versions.
Potential Impact
The vulnerability allows an attacker to cause an integer overflow in the Graphics component, which could lead to severe consequences including potential memory corruption or other security-relevant defects. The CVSS score of 9.8 reflects critical impact affecting confidentiality, integrity, and availability. Exploitation does not require privileges or user interaction, making it highly severe. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Users and administrators should upgrade to Firefox 154, Firefox ESR 140.14, or Firefox ESR 153.1 or later to remediate this vulnerability. The vendor has released official fixes in these versions. No additional mitigation is required once the update is applied.
Integer overflow in the Graphics component. (CVE-2026-74964)
Description
An integer overflow vulnerability exists in the Graphics component of Firefox. This vulnerability has been assigned CVE-2026-74964 and is rated critical with a CVSS score of 9.8. The issue was fixed in Firefox 154 and Firefox ESR versions 140.14 and 153.1. The vulnerability could potentially lead to high impact outcomes including confidentiality, integrity, and availability compromises. The vendor advisory confirms the fix is available in these versions.
CVSS v3.1
Score 9.8critical
Affected software
pkg:github/mozilla/firefox-esrRun 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-2026-74964 is an integer overflow vulnerability in the Graphics component of Firefox. The flaw was identified internally and fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. The vulnerability has a critical severity rating with a CVSS 3.1 base score of 9.8, indicating it can be exploited remotely without privileges or user interaction, resulting in high impact on confidentiality, integrity, and availability. The Mozilla Foundation security advisories MFSA2026-74 and MFSA2026-76 provide detailed information and confirm the availability of patches in the stated Firefox versions.
Potential Impact
The vulnerability allows an attacker to cause an integer overflow in the Graphics component, which could lead to severe consequences including potential memory corruption or other security-relevant defects. The CVSS score of 9.8 reflects critical impact affecting confidentiality, integrity, and availability. Exploitation does not require privileges or user interaction, making it highly severe. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Users and administrators should upgrade to Firefox 154, Firefox ESR 140.14, or Firefox ESR 153.1 or later to remediate this vulnerability. The vendor has released official fixes in these versions. No additional mitigation is required once the update is applied.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-7p8c-3v22-58jp
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-74964"]
- Ecosystems
- []
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6a85ee2dacd9273b4969aa12
Added to database: 08/19/2026, 17:55:57 UTC
Last enriched: 08/19/2026, 18:07:53 UTC
Last updated: 08/20/2026, 01:52:00 UTC
Views: 4
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