🛡️ CVE-2026-42448 — magic-wormhole

🟢 CVSS 3.5 — Low ✅ No Known Exploit CWE-22 NVD
3.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

Impact

A receiver who specifies "--output <dir>" where that output directory currently exists (as a directory).

Patches

0.24.0 will contain the patch

Workarounds

Ensure local target directories specified by "--output" do not already exist

Resources

Private email and Signal communications from a user.

Magic Wormhole thanks @marduc812

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Weakness class

CVE-2026-42448 is classified as CWE-22: Path Traversal. A file path built from user input is not confined to the intended directory, letting an attacker reach files elsewhere on the filesystem.

Affected software

CVE-2026-42448 is recorded against 2 packages.

  • magic-wormhole (from 0.23.0 up to 0.24.0)
  • unknown

Timeline and source

Published on 6 May 2026 and last revised on 13 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)

Details

Severity LOW
CVSS Score 3.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CWE CWE-22
Public Exploit ✅ No
Source NVD
Published 2026-05-06
Updated 2026-08-12
Modified 2026-07-13
Fix URL N/A

Affected Packages

Software From version Fixed in
magic-wormhole 0.23.0 0.24.0
unknown — —

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