{"cve":"CVE-2018-5131","nvd":{"published":"2018-06-11T21:29:14.157","modified":"2026-06-17T01:59:40.860","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-200"],"references":["http://www.securityfocus.com/bid/103388","http://www.securitytracker.com/id/1040514","https://access.redhat.com/errata/RHSA-2018:0526","https://access.redhat.com/errata/RHSA-2018:0527","https://bugzilla.mozilla.org/show_bug.cgi?id=1440775"],"products":["canonical:ubuntu_linux","debian:debian_linux","mozilla:firefox","redhat:enterprise_linux_desktop","redhat:enterprise_linux_server","redhat:enterprise_linux_server_aus","redhat:enterprise_linux_server_eus","redhat:enterprise_linux_workstation"],"source":"nvd","synced_at":"2026-10-19T20:51:47.459859389+00:00"},"epss":{"cve":"CVE-2018-5131","score":0.02247,"percentile":0.8288,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}