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CVE-2026-74954— Information disclosure due to side-channel in the Storage: Cache API component

AI Predicted 5.9 Difficulty: Theoretical

Affected Version Matrix 4

VendorProductVersion RangeStatus
MozillaFirefox153.1≤ 153.*unaffected
154≤ *unaffected
MozillaThunderbird153.1≤ 153.*unaffected
154≤ *unaffected
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I. Basic Information for CVE-2026-74954

Vulnerability Information
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Vulnerability Title
Information disclosure due to side-channel in the Storage: Cache API component
Source: CVE Program / CVE List V5
Vulnerability Description
Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
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 153.1 ~ 153.* -
MozillaThunderbird 153.1 ~ 153.* -

II. Public POCs for CVE-2026-74954

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III. Intelligence Information for CVE-2026-74954

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Vendor Advisories for CVE-2026-74954 (4)

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

CVE-2026-74952Privilege escalation in the Application Update component
CVE-2026-74979Mitigation bypass in the Add-ons Manager component
CVE-2026-74982Denial-of-service in the Widget component
CVE-2026-74985Privilege escalation in the Enterprise Policies component
CVE-2026-74984Race condition in the JavaScript Engine component
CVE-2026-74986Site isolation issue in the CSS Parsing and Computation component
CVE-2026-74961Side-channel in the Web Audio 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-2026-74977Integer overflow in the Graphics component
CVE-2026-74951Clickjacking issue in Firefox for Android
CVE-2026-74955Privilege escalation in the Request Handling 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 Thunderbird ESR 140.14, Thunderbird ESR 153.1 and Thunderbi
CVE-2026-74987Internally found bugs fixed in Thunderbird ESR 140.14, Thunderbird ESR 153.1 and Thunderbi

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

IV. Related Vulnerabilities

Same product: Firefox
Same vendor: Mozilla

V. Comments for CVE-2026-74954

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