CVE-2026-0883: Information disclosure in the Networking component
Information disclosure in the Networking component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.
Other sources
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
— MITRE
Affected Software
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2026-0883?
CVE-2026-0883 is classified as a moderate severity vulnerability due to its potential for information disclosure.
How do I fix CVE-2026-0883?
To fix CVE-2026-0883, upgrade to Firefox version 147 or Firefox ESR version 140.7 or later.
What components are affected by CVE-2026-0883?
CVE-2026-0883 affects the Networking component in Firefox versions prior to 147 and Firefox ESR versions prior to 140.7.
What type of vulnerability is CVE-2026-0883?
CVE-2026-0883 is an information disclosure vulnerability.
Is there a workaround for CVE-2026-0883?
There is no known workaround for CVE-2026-0883, so users are advised to update their browsers.