CVE-2026-8975: Vulnerability in Mozilla Firefox
Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI Analysis
Technical Summary
CVE-2026-8975 involves memory safety bugs in Firefox ESR 115.35, ESR 140.10, and Firefox 150. These bugs include evidence of memory corruption, which could be exploited to execute arbitrary code. Mozilla fixed these vulnerabilities in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. The CVSS v3.1 base score is 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. The vendor advisories confirm these fixes and provide detailed references to the bugs and reporters.
Potential Impact
Successful exploitation of these memory safety bugs could lead to arbitrary code execution, compromising confidentiality, integrity, and availability of the affected systems running vulnerable Firefox versions. The CVSS score of 8.8 reflects a high impact with potential for remote exploitation without privileges but requiring user interaction.
Mitigation Recommendations
Mozilla has released official fixes for these vulnerabilities in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. Users and administrators should update to these fixed versions immediately to mitigate the risk. There are no indications that the vulnerabilities are currently exploited in the wild. Patch status is confirmed by the vendor advisories.
CVE-2026-8975: Vulnerability in Mozilla Firefox
Description
Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVSS v3.1
Score 8.8high
Affected software
pkg:github/mozilla/firefoxRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8975 involves memory safety bugs in Firefox ESR 115.35, ESR 140.10, and Firefox 150. These bugs include evidence of memory corruption, which could be exploited to execute arbitrary code. Mozilla fixed these vulnerabilities in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. The CVSS v3.1 base score is 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. The vendor advisories confirm these fixes and provide detailed references to the bugs and reporters.
Potential Impact
Successful exploitation of these memory safety bugs could lead to arbitrary code execution, compromising confidentiality, integrity, and availability of the affected systems running vulnerable Firefox versions. The CVSS score of 8.8 reflects a high impact with potential for remote exploitation without privileges but requiring user interaction.
Mitigation Recommendations
Mozilla has released official fixes for these vulnerabilities in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. Users and administrators should update to these fixed versions immediately to mitigate the risk. There are no indications that the vulnerabilities are currently exploited in the wild. Patch status is confirmed by the vendor advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-19T12:30:23.949Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-47/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-48/","vendor":"Mozilla"}]
Threat ID: 6a0c6782ec166c07b0a99bcb
Added to database: 05/19/2026, 13:37:06 UTC
Last enriched: 07/15/2026, 08:15:09 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 95
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