Description
A flaw in Node.js Permission Model filesystem enforcement leaves fs.realpathSync() without the required read permission checks. This is an incomplete fix of CVE-2026-21715, which only covered fs.realpathSync.native().
As a result, code running under --permission with restricted --allow-fs-read can still use fs.realpathSync() to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories.
This vulnerability affects Node.js 26.x, 24.x, and 22.x.
Mitigation
Minimal update. May introduce new vulnerabilities or breaking changes.
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 debian 12 | | =18.13.0+dfsg1-1 || =18.13.0+dfsg1-1.1 || =18.19.0+dfsg-1 || =18.19.0+dfsg-2 || =18.19.0+dfsg-3 || =18.19.0+dfsg-4 || =18.19.0+dfsg-5 || =18.19.0+dfsg-6 || =18.19.0+dfsg-6~deb12u1 || =18.19.0+dfsg-6~deb12u2 || =18.19.1+dfsg-1 || =18.19.1+dfsg-2 || =18.19.1+dfsg-3 || =18.19.1+dfsg-3.1 || =18.19.1+dfsg-4 || =18.19.1+dfsg-6 || =18.20.1+dfsg-1 || =18.20.1+dfsg-2 || =18.20.1+dfsg-3 || =18.20.1+dfsg-4 || =18.20.4+dfsg-1~deb12u1 || =18.20.4+dfsg-1~deb12u2 || =18.20.4+dfsg-1~deb12u3 || =20.10.0+dfsg-1 || =20.12.2+dfsg-1 || =20.13.0+dfsg-1 || =20.13.1+dfsg-1 || =20.13.1+dfsg-2 || =20.14.0+dfsg-1 || =20.14.0+dfsg-2 || =20.14.0+dfsg-3 || =20.15.0+dfsg-1 || =20.15.1+dfsg-1 || =20.16.0+dfsg-1 || =20.17.0+dfsg-1 || =20.17.0+dfsg-2 || =20.18.0+dfsg-1 || =20.18.0+dfsg-2 || =20.18.1+dfsg-1 || =20.18.1+dfsg-2 || =20.18.2+dfsg-1 || =20.18.2+dfsg-2 || =20.18.2+dfsg-3 || =20.18.2+dfsg-4 || =20.18.3+dfsg-1 || =20.19.0+dfsg-1 || =20.19.0+dfsg-2 || =20.19.0+dfsg1-1 || =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 || =22.22.2+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-3 || =24.11.1+dfsg+~cs24.10.1-1 || =24.11.1+dfsg+~cs24.10.1-2 || =24.12.0+dfsg+~cs24.10.4-1 || =24.13.0+dfsg+~cs24.10.7-1 || =24.13.0+dfsg+~cs24.10.7-2 || =24.14.0+dfsg+~cs24.12.0-1 || =24.14.0+dfsg+~cs24.12.0-2 || =24.14.1+dfsg+~cs24.12.0-1 || =24.15.0+dfsg+~cs24.12.2-1 || =24.16.0+dfsg+~cs24.13.1-1 || =24.16.0+dfsg+~cs24.13.1-2 || =24.17.0+dfsg+~cs24.13.2-1 || =24.18.0+dfsg+~cs24.13.2-1 || =24.19.0+dfsg+~cs24.13.3-1 || =24.20.0+dfsg+~cs24.13.3-1 || =24.20.0+dfsg+~cs24.13.3-2 || =24.21.0+dfsg+~cs24.13.4-1 || =24.22.0+dfsg+~cs24.19.2-1 || =24.22.0+dfsg+~cs24.19.2-2 | - |
debian 13 | | =20.19.2+dfsg-1 || =20.19.2+dfsg-1+deb13u1 || =20.19.2+dfsg-1+deb13u2 || =20.19.2+dfsg-1+deb13u3 || =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 || =22.22.2+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-3 || =24.11.1+dfsg+~cs24.10.1-1 || =24.11.1+dfsg+~cs24.10.1-2 || =24.12.0+dfsg+~cs24.10.4-1 || =24.13.0+dfsg+~cs24.10.7-1 || =24.13.0+dfsg+~cs24.10.7-2 || =24.14.0+dfsg+~cs24.12.0-1 || =24.14.0+dfsg+~cs24.12.0-2 || =24.14.1+dfsg+~cs24.12.0-1 || =24.15.0+dfsg+~cs24.12.2-1 || =24.16.0+dfsg+~cs24.13.1-1 || =24.16.0+dfsg+~cs24.13.1-2 || =24.17.0+dfsg+~cs24.13.2-1 || =24.18.0+dfsg+~cs24.13.2-1 || =24.19.0+dfsg+~cs24.13.3-1 || =24.20.0+dfsg+~cs24.13.3-1 || =24.20.0+dfsg+~cs24.13.3-2 || =24.21.0+dfsg+~cs24.13.4-1 || =24.22.0+dfsg+~cs24.19.2-1 || =24.22.0+dfsg+~cs24.19.2-2 | - |
debian 14 | | =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 || =22.22.2+dfsg+~cs22.19.15-1 || =22.22.2+dfsg+~cs22.19.15-3 || =24.11.1+dfsg+~cs24.10.1-1 || =24.11.1+dfsg+~cs24.10.1-2 || =24.12.0+dfsg+~cs24.10.4-1 || =24.13.0+dfsg+~cs24.10.7-1 || =24.13.0+dfsg+~cs24.10.7-2 || =24.14.0+dfsg+~cs24.12.0-1 || =24.14.0+dfsg+~cs24.12.0-2 || =24.14.1+dfsg+~cs24.12.0-1 || =24.15.0+dfsg+~cs24.12.2-1 || =24.16.0+dfsg+~cs24.13.1-1 || =24.16.0+dfsg+~cs24.13.1-2 || =24.17.0+dfsg+~cs24.13.2-1 || =24.18.0+dfsg+~cs24.13.2-1 || =24.19.0+dfsg+~cs24.13.3-1 || =24.20.0+dfsg+~cs24.13.3-1 || =24.20.0+dfsg+~cs24.13.3-2 || =24.21.0+dfsg+~cs24.13.4-1 || =24.22.0+dfsg+~cs24.19.2-1 || =24.22.0+dfsg+~cs24.19.2-2 | - |
 alpine v3.21 | | | 22.23.4-r0 |
alpine v3.23 | | | 24.22.1-r0 |
alpine v3.24 | | | 24.22.1-r0 |
alpine v3.22 | | | 22.23.4-r0 |
 rpm rhel8 | | - | - |
rpm rhel9 | | - | - |
rpm rhel10 | | - | - |
