firefox security update (CVE-2026-100760)
Description
Multiple critical security vulnerabilities affecting Mozilla Firefox were fixed in Firefox ESR 153.4 and Firefox 157. These include sandbox escapes, use-after-free bugs, mitigation bypasses, same-origin policy bypass, denial-of-service, privilege escalation, and cryptography misuse across various components such as the JavaScript engine, DOM, graphics, storage, and networking. The vulnerabilities could allow remote attackers to execute arbitrary code, escalate privileges, bypass security mitigations, or cause denial of service. The issues affect versions prior to Firefox ESR 153.4 and Firefox 157.
CVSS v3.1
Score 10.0critical
Affected software
pkg:rpm/openEuler/firefox&distro=openEuler-24.03-LTS-SP4Run 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
This security update addresses numerous critical vulnerabilities in Mozilla Firefox, including sandbox escapes in multiple components (Process Sandboxing, XUL, Disability Access APIs), use-after-free vulnerabilities in the JavaScript WebAssembly component, JavaScript Engine JIT, and DOM UI Events & Focus Handling, mitigation bypasses in DOM components and Bookmarks & History, same-origin policy bypass in DevTools, denial-of-service in graphics and storage components, privilege escalation in the Places component, spoofing in HTTP networking, and cryptography misuse in the Storage Quota Manager. These vulnerabilities were fixed in Firefox ESR 153.4 and Firefox 157.
Potential Impact
Exploitation of these vulnerabilities could allow remote attackers to break out of sandbox restrictions, execute arbitrary code, escalate privileges, bypass security mitigations, cause denial of service, or spoof content. The CVSS score of 10.0 indicates critical severity with high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A security update fixing all listed vulnerabilities is available in Firefox ESR 153.4 and Firefox 157. Users and administrators should apply these official patches promptly to mitigate the risks. No additional mitigations are specified beyond applying the update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- OESA-2026-4452
- Osv Schema Version
- 1.7.2
- Ecosystems
- ["openEuler:24.03-LTS-SP4"]
- Database Specific Severity
- Critical
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ada44d14d27ba8daa6a4a19
Added to database: 10/22/2026, 17:16:01 UTC
Last enriched: 10/22/2026, 17:22:38 UTC
Last updated: 10/23/2026, 00:15:13 UTC
Views: 5
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