Under certain circumstances the "fetch()" API can return transient local copies of resources that were sent with a "no-store" or "no-cache" cache header instead of downloading a copy from the network as it should. This can result in previously stored, locally cached data of a website being accessible to users if they share a common profile while browsing. This vulnerability affects Firefox ESR < 52.7 and Firefox < 59.

Related CVEs

CVE-2018-5131

Key Information

GHSA ID

GHSA-hf84-87fj-v8xv

Published

May 14, 2022 1:27 AM

Last Modified

May 14, 2022 1:27 AM

CVSS Score

5.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: September 11, 2025 6:35 AM

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