{"cve":"CVE-2021-26910","nvd":{"published":"2021-02-08T20:15:13.090","modified":"2026-06-17T03:43:59.100","status":"Modified","description":"Firejail before 0.9.64.4 allows attackers to bypass intended access restrictions because there is a TOCTOU race condition between a stat operation and an OverlayFS mount operation.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.0},"cwes":["CWE-367"],"references":["http://www.openwall.com/lists/oss-security/2021/02/09/1","https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b","https://github.com/netblue30/firejail/releases/tag/0.9.64.4","https://lists.debian.org/debian-lts-announce/2021/02/msg00015.html","https://security.gentoo.org/glsa/202105-19"],"products":["debian:debian_linux","firejail_project:firejail"],"source":"nvd","synced_at":"2026-10-19T21:14:10.479542811+00:00"},"epss":{"cve":"CVE-2021-26910","score":0.00444,"percentile":0.38671,"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."]}