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.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1308-1 firefox-esr security update
Debian DSA Debian DSA DSA-4139-1 firefox-esr security update
EUVD EUVD EUVD-2018-16917 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.
Ubuntu USN Ubuntu USN USN-3596-1 Firefox vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 25 Nov 2025 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Vendors & Products Mozilla firefox Esr

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2024-08-05T05:26:46.949Z

Reserved: 2018-01-03T00:00:00

Link: CVE-2018-5131

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-06-11T21:29:14.157

Modified: 2025-11-25T17:50:16.803

Link: CVE-2018-5131

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-03-14T00:00:00Z

Links: CVE-2018-5131 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses