React Router has Path Traversal in File Session Storage

Description

If applications use createFileSessionStorage() 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.

Recommendation

Update the @remix-run/deno package to the latest compatible version. Followings are version details:

• Affected version(s): <= 2.17.1
• Patched version(s): 2.17.2

References

• GHSA-9583-h5hc-x8cw
• CVE-2025-61686
• CWE-22
• CAPEC-310
• OWASP 2021-A1
• OWASP 2021-A6

Related Issues

• fast-xml-parser has RangeError DoS Numeric Entities Bug - CVE-2026-25128
• DOMPurify vulnerable to tampering by prototype polution - CVE-2024-48910
• cors-anywhere vulnerable to server-side request forgery - CVE-2020-36851
• [email protected] contains malware after npm account takeover - CVE-2025-59144

Tags:

npm

@remix-run/deno