{"id":"ALPINE-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\n\r\nAs 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\n\r\nThis vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-write` is intentionally restricted.","modified":"2026-04-05T16:31:24.510411Z","published":"2026-03-30T20:16:19.873Z","upstream":["CVE-2026-21716"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2026-21716"}],"affected":[{"package":{"name":"nodejs","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/nodejs?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"22.22.2-r0"}]}],"versions":["22.11.0-r0","22.11.0-r1","22.13.1-r0","22.15.1-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-21716.json"}},{"package":{"name":"nodejs","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/nodejs?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"22.22.2-r0"}]}],"versions":["22.11.0-r0","22.11.0-r1","22.11.0-r2","22.13.1-r0","22.13.1-r1","22.13.1-r2","22.13.1-r3","22.13.1-r4","22.13.1-r5","22.16.0-r0","22.16.0-r1","22.16.0-r2","22.22.0-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-21716.json"}},{"package":{"name":"nodejs","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/nodejs?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"24.14.1-r0"}]}],"versions":["22.11.0-r0","22.11.0-r1","22.11.0-r2","22.13.1-r0","22.13.1-r1","22.13.1-r2","22.13.1-r3","22.13.1-r4","22.13.1-r5","22.16.0-r0","22.16.0-r1","22.16.0-r2","22.16.0-r3","22.19.0-r3","22.19.0-r4","22.21.0-r0","24.11.1-r0","24.13.0-r0","24.13.0-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-21716.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}