When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.

Related CVEs

CVE-2022-26387

Key Information

GHSA ID

GHSA-w44g-v7w6-xpcv

Published

December 22, 2022 9:30 PM

Last Modified

April 15, 2025 9:31 PM

CVSS Score

7.5 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: November 26, 2025 6:30 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.