Information Disclosure in Firefox by Mozilla
CVE-2026-84132

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 1 September 2026

What is CVE-2026-84132?

This vulnerability in the Networking: HTTP component of Firefox could allow an attacker to obtain sensitive information from memory. The issue was addressed in Firefox version 155 and Firefox ESR 153.2, where security measures were enhanced to prevent unauthorized data exposure. Users are encouraged to update to the latest versions to mitigate risks associated with this vulnerability.

Affected Version(s)

Firefox 153.2

Firefox 155

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2063020

https://www.mozilla.org/security/advisories/mfsa2026-82/

https://www.mozilla.org/security/advisories/mfsa2026-85/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Sep 1, 2026
Vulnerability Reserved
Sep 1, 2026

Credit

Shu Takahashi

CVE-2026-84132 Data

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