CVE-2026-109721
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- CVE-2026-109721
CVE Details
| Release Date: | 2026-10-13 | |
| Impact: | Important | What is this? |
Description
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
See more information about CVE-2026-109721 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 metrics
| Base Score: | 8.8 |
| Vector String: | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Version: | 3.1 |
| Attack Vector: | Network |
| Attack Complexity: | Low |
| Privileges Required: | None |
| User Interaction: | Required |
| Scope: | Unchanged |
| Confidentiality Impact: | High |
| Integrity Impact: | High |
| Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 10 (firefox) | ELSA-2026-89758 | 2026-10-26 |
| Oracle Linux version 8 (firefox) | ELSA-2026-89756 | 2026-10-26 |
| Oracle Linux version 9 (firefox) | ELSA-2026-89757 | 2026-10-26 |
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