CVE-2026-41180

HIGH 7.5

PsiTransfer: Upload PATCH path traversal can create `config.<NODE_ENV>.js` and lead to code execution on restart

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

PsiTransfer is an open source, self-hosted file sharing solution. Prior to version 2.4.3, the upload PATCH flow under `/files/:uploadId` validates the mounted request path using the still-encoded `req.path`, but the downstream tus handler later writes using the decoded `req.params.uploadId`. In deployments that use a supported custom `PSITRANSFER_UPLOAD_DIR` whose basename prefixes a startup-loaded JavaScript path, such as `conf`, an unauthenticated attacker can create `config.<NODE_ENV>.js` in the application root. The attacker-controlled file is then executed on the next process restart. Version 2.4.3 contains a patch.

CWE	CWE-22
Vendor	psi-4ward
Product	psitransfer
Published	Apr 23, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

psi-4ward / psitransfer

< 2.4.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/psi-4ward/psitransfer/security/advisories/GHSA-533q-w4g6-5586 github.com: https://github.com/psi-4ward/psitransfer/commit/8b547bf3e09757122efa00aab90281e3915aa0c6 github.com: https://github.com/psi-4ward/psitransfer/releases/tag/v2.4.3