{"cve":"CVE-2021-41146","nvd":{"published":"2021-10-21T18:15:10.303","modified":"2026-06-17T04:07:58.013","status":"Modified","description":"qutebrowser is an open source keyboard-focused browser with a minimal GUI. Starting with qutebrowser v1.7.0, the Windows installer for qutebrowser registers a `qutebrowserurl:` URL handler. With certain applications, opening a specially crafted `qutebrowserurl:...` URL can lead to execution of qutebrowser commands, which in turn allows arbitrary code execution via commands such as `:spawn` or `:debug-pyeval`. Only Windows installs where qutebrowser is registered as URL handler are affected. The issue has been fixed in qutebrowser v2.4.0. The fix also adds additional hardening for potential similar issues on Linux (by adding the new --untrusted-args flag to the .desktop file), though no such vulnerabilities are known.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-77","CWE-88","CWE-641"],"references":["https://github.com/qutebrowser/qutebrowser/commit/8f46ba3f6dc7b18375f7aa63c48a1fe461190430","https://github.com/qutebrowser/qutebrowser/security/advisories/GHSA-vw27-fwjf-5qxm","https://github.com/qutebrowser/qutebrowser/commit/8f46ba3f6dc7b18375f7aa63c48a1fe461190430","https://github.com/qutebrowser/qutebrowser/security/advisories/GHSA-vw27-fwjf-5qxm"],"products":["qutebrowser:qutebrowser"],"source":"nvd","synced_at":"2026-10-19T21:24:39.218183596+00:00"},"epss":{"cve":"CVE-2021-41146","score":0.01496,"percentile":0.74193,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vw27-fwjf-5qxm","url":"https://osv.dev/vulnerability/GHSA-vw27-fwjf-5qxm","summary":"Arbitrary command execution on Windows via qutebrowserurl: URL handler","modified":"2026-07-08T06:28:00.918975591Z","packages":[{"ecosystem":"PyPI","name":"qutebrowser","purl":"pkg:pypi/qutebrowser","ranges":[">=1.7.0 <2.4.0"],"fixed":["2.4.0"]}]},{"id":"PYSEC-2021-382","url":"https://osv.dev/vulnerability/PYSEC-2021-382","summary":"","modified":"2023-11-08T04:06:52.852418Z","packages":[{"ecosystem":"PyPI","name":"qutebrowser","purl":"pkg:pypi/qutebrowser","ranges":["<1.8.0",">=2.0.0 <2.4.0"],"fixed":["1.8.0","2.4.0"]}]}],"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."]}