{"cve":"CVE-2021-42762","nvd":{"published":"2021-10-20T19:15:07.637","modified":"2026-06-17T04:10:05.923","status":"Modified","description":"BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by the sandbox, by abusing VFS syscalls that manipulate its filesystem namespace. The impact is limited to host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process remains otherwise confined. NOTE: this is similar to CVE-2021-41133.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","score":5.3},"cwes":[],"references":["http://www.openwall.com/lists/oss-security/2021/10/26/9","http://www.openwall.com/lists/oss-security/2021/10/27/1","http://www.openwall.com/lists/oss-security/2021/10/27/2","http://www.openwall.com/lists/oss-security/2021/10/27/4","https://bugs.webkit.org/show_bug.cgi?id=231479"],"products":["debian:debian_linux","fedoraproject:fedora","webkitgtk:webkitgtk","wpewebkit:wpe_webkit"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-42762","score":0.00539,"percentile":0.45369,"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."]}