{"id":"DEBIAN-CVE-2026-21716","details":"An incomplete fix for CVE-2024-36137 leaves `FileHandle.chmod()` and `FileHandle.chown()` in the promises API without the required permission checks, while their callback-based equivalents (`fs.fchmod()`, `fs.fchown()`) were correctly patched.\r \r As a result, code running under `--permission` with restricted `--allow-fs-write` can still use promise-based `FileHandle` methods to modify file permissions and ownership on already-open file descriptors, bypassing the intended write restrictions.\r \r This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-write` is intentionally restricted.","modified":"2026-08-27T23:05:55.522187387Z","published":"2026-03-30T20:16:19.873Z","upstream":["CVE-2026-21716"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-21716"}],"affected":[{"package":{"name":"nodejs","ecosystem":"Debian:13","purl":"pkg:deb/debian/nodejs?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"20.19.2+dfsg-1+deb13u2"}]}],"versions":["20.19.2+dfsg-1","20.19.2+dfsg-1+deb13u1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-21716.json"}},{"package":{"name":"nodejs","ecosystem":"Debian:14","purl":"pkg:deb/debian/nodejs?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"22.22.2+dfsg+~cs22.19.15-1"}]}],"versions":["20.19.2+dfsg-1","20.19.4+dfsg-1","20.19.5+dfsg+~cs20.19.12-1","20.19.5+dfsg+~cs20.19.12-2","20.19.5+dfsg+~cs20.19.12-3","20.19.5+dfsg+~cs20.19.12-4","20.19.5+dfsg+~cs20.19.24-1","22.12.0+dfsg-1","22.12.0+dfsg-2","22.12.0+dfsg-3","22.14.0+dfsg-1","22.18.0+dfsg+~cs22.17.2-1","22.18.0+dfsg+~cs22.17.2-2","22.18.0+dfsg-1","22.19.0+dfsg+~cs22.18.0-1","22.21.1+dfsg+~cs22.19.0-1","22.21.1+dfsg+~cs22.19.0-2","22.21.1+dfsg+~cs22.19.0-3","22.21.1+dfsg+~cs22.19.0-4","22.21.1+dfsg+~cs22.19.0-5","22.21.1+dfsg+~cs22.19.0-6","22.22.0+dfsg+~cs22.19.13-1","22.22.0+dfsg+~cs22.19.13-2","22.22.0+dfsg+~cs22.19.6-1","22.22.1+dfsg+~cs22.19.15-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-21716.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}