Vulnerability-Lookup

CVE-2026-32116 (GCVE-0-2026-32116)

Vulnerability from cvelistv5 – Published: 2026-03-12 17:40 – Updated: 2026-03-13 16:24

Title

Magic Wormhole: "wormhole receive" allows arbitrary local file overwrite

Summary

Magic Wormhole makes it possible to get arbitrary-sized files and directories from one computer to another. From 0.21.0 to before 0.23.0, receiving a file (wormhole receive) from a malicious party could result in overwriting critical local files, including ~/.ssh/authorized_keys and .bashrc. This could be used to compromise the receiver's computer. Only the sender of the file (the party who runs wormhole send) can mount the attack. Other parties (including the transit/relay servers) are excluded by the wormhole protocol. This vulnerability is fixed in 0.23.0.

Severity ?

8.2 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

URL

Tags

https://github.com/magic-wormhole/magic-wormhole/…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	magic-wormhole	magic-wormhole	Affected: >= 0.21.0, < 0.23.0

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-32116

Vulnerability from fkie_nvd - Published: 2026-03-12 18:16 - Updated: 2026-03-16 18:02

Severity ?

8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/magic-wormhole/magic-wormhole/security/advisories/GHSA-4g4c-mfqg-pj8r	Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	magic-wormhole_project	magic_wormhole	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:magic-wormhole_project:magic_wormhole:*:*:*:*:*:python:*:*",
              "matchCriteriaId": "DB258A1D-FF14-459B-9EAC-8B4EE6F2B27F",
              "versionEndExcluding": "0.23.0",
              "versionStartIncluding": "0.21.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Magic Wormhole makes it possible to get arbitrary-sized files and directories from one computer to another. From 0.21.0 to before 0.23.0, receiving a file (wormhole receive) from a malicious party could result in overwriting critical local files, including ~/.ssh/authorized_keys and .bashrc. This could be used to compromise the receiver\u0027s computer. Only the sender of the file (the party who runs wormhole send) can mount the attack. Other parties (including the transit/relay servers) are excluded by the wormhole protocol. This vulnerability is fixed in 0.23.0."
    },
    {
      "lang": "es",
      "value": "Magic Wormhole permite obtener archivos y directorios de tama\u00f1o arbitrario de un ordenador a otro. Desde la versi\u00f3n 0.21.0 hasta antes de la 0.23.0, recibir un archivo (wormhole receive) de un actor malicioso podr\u00eda resultar en la sobrescritura de archivos locales cr\u00edticos, incluyendo ~/.ssh/authorized_keys y .bashrc. Esto podr\u00eda utilizarse para comprometer el ordenador del receptor. Solo el remitente del archivo (el actor que ejecuta wormhole send) puede llevar a cabo el ataque. Otras partes (incluyendo los servidores de tr\u00e1nsito/retransmisi\u00f3n) quedan excluidas por el protocolo wormhole. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 0.23.0."
    }
  ],
  "id": "CVE-2026-32116",
  "lastModified": "2026-03-16T18:02:21.613",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
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        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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    "cvssMetricV40": [
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
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          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
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          "version": "4.0",
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          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
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  "references": [
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      "source": "security-advisories@github.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/magic-wormhole/magic-wormhole/security/advisories/GHSA-4g4c-mfqg-pj8r"
    }
  ],
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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}

GHSA-4G4C-MFQG-PJ8R

Vulnerability from github – Published: 2026-03-13 15:40 – Updated: 2026-03-13 15:40

Summary

Magic Wormhole: "wormhole receive" allows arbitrary local file overwrite

Details

Impact

What kind of vulnerability is it? Who is impacted?

Receiving a file (wormhole receive) from a malicious party could result in overwriting critical local files, including ~/.ssh/authorized_keys and .bashrc. This could be used to compromise the receiver's computer.

Only the sender of the file (the party who runs wormhole send) can mount the attack. Other parties (including the transit/relay servers) are excluded by the wormhole protocol.

Patches

Has the problem been patched? What versions should users upgrade to?

The bug has been fixed in magic-wormhole 0.23.0. All users should upgrade to this version.

The vulnerability first surfaced in the 0.21.0 release on 23-Oct-2025.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

As a workaround, the receiver can override the sender's filename with the --output or -o option. For example: wormhole receive -o shopping-list.txt will write the file to shopping-list.txt in the local directory, regardless of what the sender tries to do. To be effective, this option must be added to every invocation of wormhole receive / wormhole rx.

References

Are there any links users can visit to find out more?

Incoming file transfer requests include a filename, used to decide where the file contents will be written. Well-behaving senders compute this from the basename() of the sent file (which discards all but the last segment of the path). To guard against malicious senders, the receiver also applies basename() to the incoming filename. During refactoring in version 0.21.0, this receiver-side check was accidentally dropped. The check was restored in version 0.23.0 along with a unit test.

Many thanks to Ian McKenzie (@ikmckenz) for spotting the bug and reaching out with a fix.

Severity ?

8.2 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "magic-wormhole"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.21.0"
            },
            {
              "fixed": "0.23.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32116"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-13T15:40:20Z",
    "nvd_published_at": "2026-03-12T18:16:24Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nReceiving a file (`wormhole receive`) from a malicious party could result in overwriting critical local files, including `~/.ssh/authorized_keys` and `.bashrc`. This could be used to compromise the receiver\u0027s computer.\n\nOnly the sender of the file (the party who runs `wormhole send`) can mount the attack. Other parties (including the transit/relay servers) are excluded by the wormhole protocol.\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nThe bug has been fixed in magic-wormhole 0.23.0. All users should upgrade to this version.\n\nThe vulnerability first surfaced in the 0.21.0 release on 23-Oct-2025.\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nAs a workaround, the receiver can override the sender\u0027s filename with the `--output` or `-o` option. For example: `wormhole receive -o shopping-list.txt` will write the file to `shopping-list.txt` in the local directory, regardless of what the sender tries to do. To be effective, this option must be added to every invocation of `wormhole receive` / `wormhole rx`.\n\n### References\n_Are there any links users can visit to find out more?_\n\nIncoming file transfer requests include a `filename`, used to decide where the file contents will be written. Well-behaving senders compute this from the `basename()` of the sent file (which discards all but the last segment of the path). To guard against malicious senders, the receiver also applies `basename()` to the incoming filename. During refactoring in version 0.21.0, this receiver-side check was accidentally dropped. The check was restored in version 0.23.0 along with a unit test.\n\nMany thanks to Ian McKenzie (@ikmckenz) for spotting the bug and reaching out with a fix.",
  "id": "GHSA-4g4c-mfqg-pj8r",
  "modified": "2026-03-13T15:40:20Z",
  "published": "2026-03-13T15:40:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/magic-wormhole/magic-wormhole/security/advisories/GHSA-4g4c-mfqg-pj8r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32116"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/magic-wormhole/magic-wormhole"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Magic Wormhole: \"wormhole receive\" allows arbitrary local file overwrite"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-32116 (GCVE-0-2026-32116)

FKIE_CVE-2026-32116

GHSA-4G4C-MFQG-PJ8R

Impact

Patches

Workarounds

References

Tags

Sightings

Nomenclature