CVE-2026-23950: Race Condition in node-tar Path Reservations via Unicode Ligature Collisions on macOS APFS

January 21, 2026

TITLE: Race Condition in node-tar Path Reservations via Unicode Sharp-S (ß) Collisions on macOS APFS

AUTHOR: Tomás Illuminati

References

github.com/advisories/GHSA-r6q2-hw4h-h46w
github.com/isaacs/node-tar
github.com/isaacs/node-tar/commit/3b1abfae650056edfabcbe0a0df5954d390521e6
github.com/isaacs/node-tar/security/advisories/GHSA-r6q2-hw4h-h46w
nvd.nist.gov/vuln/detail/CVE-2026-23950

Code Behaviors & Features

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