CVE-2026-74966

Firefox and Thunderbird are vulnerable to information disclosure via the Form Autofill component. CVSS 7.5 (network, no auth/interaction required) rates it HIGH for confidentiality. CISA SSVC marks exploitation as none. Fix: upgrade to Firefox 154, Firefox ESR 153.1, Thunderbird 154, or Thunderbi...

CVE-2026-74966 Information disclosure in the Form Autofill component

Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

CVE-2026-74970 Site isolation issue in the Graphics component

Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

CVE-2026-74966 Information disclosure in the Form Autofill component

Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

CVE-2026-74961 Side-channel in the Web Audio component

Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

CVE-2026-74970 Site isolation issue in the Graphics component

Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

CVE-2026-74968

Firefox's WebRender component has a site isolation flaw allowing cross-site data access or tampering, rated CVSS 5.4 (Medium). Fixed in Firefox 154 and Firefox ESR 153.1. No in-the-wild exploitation reported. Users should update immediately. Mozilla advisories: mfsa2026-74, mfsa2026-77.

CVE-2026-74970

A site isolation flaw in Mozilla's Graphics component affects Firefox and Thunderbird. The issue allows a remote, unauthenticated attacker to potentially access or modify data in other process contexts via a crafted web page. Fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbi...

CVE-2026-74961

CVE-2026-74961 is a side-channel vulnerability in the Web Audio component of Mozilla Firefox and Thunderbird. It is rated CVSS 9.1 (Critical) with a network attack vector requiring no privileges or user interaction, and high impact on both confidentiality and integrity. The flaw allows an attacke...

CVE-2026-74968 Site isolation issue in the Graphics: WebRender component

Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

CVE-2026-74961 Side-channel in the Web Audio component

Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

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

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...

CVE-2026-74954

A side-channel flaw in Firefox/Thunderbird's Storage: Cache API enables network-based information disclosure. Affected versions are fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. No public exploit or in-the-wild exploitation is reported. Users should upgrade to t...

CVE-2026-74955

Mozilla Firefox's Request Handling component contains a privilege escalation flaw rated CVSS 8.8 (HIGH). Exploitation requires network access and user interaction but no prior privileges, with HIGH impacts to confidentiality, integrity, and availability. No in-the-wild exploitation is reported. R...

CVE-2026-74956

Firefox and Thunderbird's DOM: Service Workers component has a same-origin policy bypass allowing cross-origin data access and manipulation. CVSS 9.1 (critical). Fixed in Firefox 154, ESR 153.1, Thunderbird 154, and 153.1. No exploitation reported in provided documents. Debian/Ubuntu users withou...

CVE-2026-74958

CVE-2026-74958 is an information disclosure vulnerability in the WebRTC component of Mozilla Firefox and Thunderbird. The CVSS 3.1 score is 7.5 (HIGH) , with a network attack vector requiring no privileges or user interaction, and a high impact on confidentiality. CISA SSVC assesses exploitation ...

CVE-2026-74956 Same-origin policy bypass in the DOM: Service Workers component

Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

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

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...

CVE-2026-74956 Same-origin policy bypass in the DOM: Service Workers component

Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...

CVE-2026-74955 Privilege escalation in the Request Handling component

Privilege escalation in the Request Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1...