CVE-2025-61686

React Router has Path Traversal in File Session Storage

Published Jan 10, 2026 CVSS 3.1 · 9.1 Critical EPSS 17.3% KEV · Not listed
Description
React Router is a router for React. In @react-router/node versions 7.0.0 through 7.9.3, @remix-run/deno prior to version 2.17.2, and @remix-run/node prior to version 2.17.2, if createFileSessionStorage() is being used from @react-router/node (or @remix-run/node/@remix-run/deno in Remix v2) with an unsigned cookie, it is possible for an attacker to cause the session to try to read/write from a location outside the specified session file directory. The success of the attack would depend on the permissions of the web server process to access those files. Read files cannot be returned directly to the attacker. Session file reads would only succeed if the file matched the expected session file format. If the file matched the session file format, the data would be populated into the server side session but not directly returned to the attacker unless the application logic returned specific session information. This issue has been patched in @react-router/node version 7.9.4, @remix-run/deno version 2.17.2, and @remix-run/node version 2.17.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-9583-h5hc-x8cw React Router has Path Traversal in File Session Storage
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Shopify
Shopify react-router\/node
Shopify remix-run\/deno
Shopify remix-run\/node
CPEs cpe:2.3:a:shopify:react-router\/node:*:*:*:*:*:node.js:*:*
cpe:2.3:a:shopify:remix-run\/deno:*:*:*:*:*:node.js:*:*
cpe:2.3:a:shopify:remix-run\/node:*:*:*:*:*:node.js:*:*
Vendors & Products Shopify
Shopify react-router\/node
Shopify remix-run\/deno
Shopify remix-run\/node
Type Values Removed Values Added
Description React Router is a router for React. In @react-router/node versions 7.0.0 through 7.9.3, @remix-run/deno prior to version 2.17.2, and @remix-run/node prior to version 2.17.2, if createFileSessionStorage() is being used from @react-router/node (or @remix-run/node/@remix-run/deno in Remix v2) with an unsigned cookie, it is possible for an attacker to cause the session to try to read/write from a location outside the specified session file directory. The success of the attack would depend on the permissions of the web server process to access those files. Read files cannot be returned directly to the attacker. Session file reads would only succeed if the file matched the expected session file format. If the file matched the session file format, the data would be populated into the server side session but not directly returned to the attacker unless the application logic returned specific session information. This issue has been patched in @react-router/node version 7.9.4, @remix-run/deno version 2.17.2, and @remix-run/node version 2.17.2.
Title React Router has Path Traversal in File Session Storage
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 15, 2026, 1:25 AM
Reserved
Sep 29, 2025, 8:25 PM
Status
Modified
Published
Jan 10, 2026, 3:15 AM
Modified
Jul 15, 2026, 2:17 AM
Severity
Critical
Public date
Jan 10, 2026, 2:41 AM