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CVE-2026-74989— Internally found bugs fixed in Firefox 154

AI Predicted 6.8 Difficulty: Hard

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-74989

Vulnerability Information
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Vulnerability Title
Internally found bugs fixed in Firefox 154
Source: CVE Program / CVE List V5
Vulnerability Description
Internally found bugs present in Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
MozillaFirefox 154 ~ * -

II. Public POCs for CVE-2026-74989

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III. Intelligence Information for CVE-2026-74989

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Patches & Fixes for CVE-2026-74989 (1)

Vendor Advisories for CVE-2026-74989 (2)

Same Patch Batch · Mozilla · 2026-08-18 · 58 CVEs total

CVE-2026-74951Clickjacking issue in Firefox for Android
CVE-2026-74978Clickjacking issue in the Widget component
CVE-2026-74985Privilege escalation in the Enterprise Policies component
CVE-2026-74984Race condition in the JavaScript Engine component
CVE-2026-74979Mitigation bypass in the Add-ons Manager component
CVE-2026-74982Denial-of-service in the Widget component
CVE-2026-74958Information disclosure in the WebRTC component
CVE-2026-74966Information disclosure in the Form Autofill component
CVE-2026-74956Same-origin policy bypass in the DOM: Service Workers component
CVE-2026-74952Privilege escalation in the Application Update component
CVE-2026-74961Side-channel in the Web Audio component
CVE-2026-74955Privilege escalation in the Request Handling component
CVE-2026-74954Information disclosure due to side-channel in the Storage: Cache API component
CVE-2026-74937Use-after-free in the JavaScript: GC component
CVE-2026-74938Mitigation bypass in the JavaScript: GC component
CVE-2026-74950Privilege escalation in the Downloads API component
CVE-2026-74947Privilege escalation due to invalid pointer in the Graphics component
CVE-2026-74983Mitigation bypass in the Data Loss Prevention component
CVE-2026-74990Internally found bugs fixed in Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1 a
CVE-2026-74987Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154

Showing top 20 of 58 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2026-74989

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