CVE-2026-42448: Magic Wormhole: receive, with --output pointing at an existing directory can be path-traversed

May 6, 2026 (updated June 8, 2026)

A receiver who specifies “–output ” where that output directory currently exists (as a directory).

References

github.com/advisories/GHSA-cf92-gfcw-6v53
github.com/magic-wormhole/magic-wormhole/security/advisories/GHSA-cf92-gfcw-6v53
nvd.nist.gov/vuln/detail/CVE-2026-42448

Code Behaviors & Features

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